Definitions for "Elbowing"
throwing your elbow(s) during play in order to hit another player or push him away; it is a foul if contact is made
Use of an extended elbow to hit opponent (2,5 and GM).
Using the elbow to impede or disrupt the opponent.
Keywords:  whistle, tapping, opposite, hand
Tapping the elbow of the whistle hand with the opposite hand.
Keywords:  professor, guy, saying, attention, get
what you do to get the guy next to you to pay attention to what the professor is saying.