Yes he can. Yet if it is to start a fight or celebrate then it will most likely be called delay of game. if it is to yell or talk to referees then you will be okay. It is very much by the judgment of the referee to call something like that.
offside occurs when a player of a team crosses his opponent's blue line before the puck does
In hockey, being offside means a player crosses the blue line into the offensive zone before the puck. Being in the neutral zone means a player is in the area between the blue lines.
When a player crosses their offense line and a player in their team is already in the zone so the play gets whistled dead.
An offside is when a player penetrates the opposite team's zone (as determined by the blue line) before the puck is in it.
In hockey, offsides occurs when an attacking player crosses the blue line into the offensive zone before the puck does. This is determined by the position of the player's skates relative to the blue line when the puck enters the zone. If a player is offsides, play is stopped and a faceoff is held outside the offensive zone.
, To answer your question, a Hockey "Offside" is when the player crosses the offensive blue line before the puck. There is a move called "Dragging the line" that NHL players, or in general any hockey player (Like myself) use. What they do is keep a skate ON the blue line when the puck is crossing the line and you are ahead of the play and/or puck.
Little blue guys with red crosses
When a player plays a blue Uno skip card during a game, the next player in turn is skipped and loses their chance to play a card.
Blue white checkered flag is used in formula races when the winner crosses the line.
That flag is waved when the winner crosses the line.
When a player is off sides, it means the player has crossed the opposing blue line before the puck has.
Offsides is when a player crosses the blue line before another player on the same team with the puck crosses into there zone. The player with the puck must enter there zone first. This is to prevent a player from just sitting by the goal waiting for someone to pass the puck to them so they can score.