In the mobile game of Evil Apples (Cards against Humanity) when a player (usually male) adds another player (usually female) as a friend, then invites them to a game and nobody else, just to chat with no intention of actually playing the game but to sext or either exchange snapchat info.
Said act of ONLY inviting one person to a game lobby to chat, is called a Beaver Trap.
The Term was invented by a legendary EA player named "Hessa" and marketed, propagated to a wider audience by Dr. Delicious in the Evil Apples community.
Renee - Did you hear? Farthammer beaver trapped Brittany!
Chelsea - Omg what a creep!
(In the game)
Ryan - Hey, ur sexy
Bella (victim) - Are you going to start the game or is this a beaver trap?