Definitions by -Mugatu-

MIG 

MIG is an acronym for 'Most Inappropriate Guest'. This term is used to designate the person at a party or event who is the most inappropriate based on their actions.

MIG can be a noun or a verb depending on the usage.

(noun)
Jill: Could you believe Leroy at the wedding last night?
Tara: I know! He was definitely the MIG.

(verb)
Dave: Are you going to the party at Fairmount tonight?
Steph: Yeah, I've been pre-gaming since Noon. I'm going to MIG the hell out of that party.

MIG by -Mugatu- October 13, 2011