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Boarding: When an official strikes a closed fist in the palm of the opposite hand, he is calling a two-minute minor for boarding, which is a vicious check into the boards.
Butt-Ending: When an official moves the forearm, fist closed, under the forearm of the other hand held palm down.
       
Charging: When an official rotates his arms in front of another similar to a traveling call in basketball, he is signaling a two-minute minor for charging, which is a check that a player uses more than two strides to create.
Checking From Behind: When an official places his non-whistle arm placed behind the back, elbow bent, forearm parallel to the ice surface .
       
Cross checking: When an official clenches both fists and symmetrically pushes them forward and immediately back, he is signaling a two-minute minor of cross checking, the act in which the player picks up his stick and whacks an opponent across the back. Delayed penalty: When an official raises his non-whistle hand straight up while play continues, he is alerting the teams, fans and timekeepers that a penalty will be called once the guilty team gains possession of the puck.
       
Delay of game: When an official waves his non-whistle hand in a sweeping motion into his chest and then out, he is calling a two-minute minor for delay of the game, a wide-ranging infraction that includes goalies shooting the pucks into the seats.
Elbowing: When an official taps an elbow with his other hand, he is calling a two-minute minor for elbowing, an act in which a player gains leverage on an opponent by sticking an elbow into his upper body.
       
Fighting (Roughing): When an official makes a punching gesture away from his body, he is signaling a five-minute major for fighting. Most times, these are matching penalties, good for five minutes.
Goal scored: When an official points down at the back of the net with his non-whistle hand, he is signaling a goal. This is especially useful when a pile of players gathers around the net and it's tough to see the goalie, much less the puck.
       
Hand pass: When an official opens his palm and pushes it toward his face, he is signaling a hand pass, which is a stoppage in play and a faceoff, not a minor.
High sticking: When an official holds one arm at shoulder level and grabs that wrist with the other hand, he is signaling either a two- or four-minute minor for high sticking. If blood is drawn, the guilty party sits out for four.
       
Holding: When an official grabs the opposite wrist at waist level, he is signaling a two-minute minor for holding, an act in which the player deliberately impedes an opponent's progress with his gloves or stick.
Holding/Grabbing the Face Mask: When an official hold a closed fist held in front of face, palm in, and pulled down in one straight motion.
       
Hooking: When an official holds clenched fists at waist level and symmetrically pulls them back, he is calling a two-minute minor for hooking, an act in which the player uses his stick to corral an opponent at waist level.

Icing:
Arms folded across the chest. When the puck is shot or deflected in such a manner as to produce a possible icing situation, the back linesman will signal to his partner by raising his non-whistle hand over his head. The instant that the conditions required to establish "icing the puck" have occurred, the front linesman will blow his whistle to stop play, and raise his non-whistle hand over his head. The back official will move to the resulting face-off spot and give the icing signal.

       
Interference: When an official crosses one arm over the other in front of his chest, he is calling a two-minute minor for interference, an infraction that features a player deliberately checking or impeding an opponent who does not have the puck.
Kneeing: When an official uses a single tap of the knee (non-whistle side) with the non-whistle hand, keeping both skates on the ice.
       
Misconduct: When an official places both hands on hips one time . Offside: When an official holds his non-whistle hand straight up and there is no penalty or icing to be called, he is signaling offside, an infraction that features any player in the attack zone before the puck reaches it.
       
Penalty shot: When an official joins his hands above his head similar to a safety call in football, he is signaling a penalty shot. Immediately after the call, he'll point to center ice and a player is awarded a one-on-one chance against the goaltender.
Slashing: When an official makes a chopping gesture with one hand over another, he is calling a two-minute minor for slashing, an infraction that features a player using his stick in a swinging motion across an opponent's body.
       
Timeout and Unsportsmanlike Conduct: When an official joins hands and makes a T in front of his chest. Tripping: When an official strikes his leg with his non-whistle hand, he is calling a two-minute minor for tripping, which is similar to hooking but doesn't always require a stick. Players trip with their hands, skates, whatever is most convenient.
       
Washout: When an official extends both arms out symmetrically, he is signifying a washout, which means the play continues even though it seemed a whistle was needed. This is particularly useful with scrums in the front of the net or would-be penalty calls. When controversy arises, players, coaches and fans usually look to the official for guidance. When they see the washout call, it means keep playing.