When it comes to a decision on who will be invited to your party or an outing with friends the nerds or uncool ones get the "outvote" thus they are "outvoted".
Shane: Dudes, should we invite
Eric to the party
Rudy: He gets an "outvote"!
Lyle: "No man, Eric is cool
he gets a definite invote
remember the last party when he did 5 kegstands
passed out, woke up and then jumped up and did two more?"
Sam: "Yeah, Eric is an invote
he is fun!"
Chris: "I think Rudy should get an "outvote", he's a nerd