I female who battens down the hatches, lets say, and looks phenomenal out at the club, bar, random frat jungle party, etc. Only, when you take said female home with you and her clothes are removed you are finally introduced to all the fat she smuggled in with her to one of the previously described locations.
Basically it's chicks that look good in clothes and that's about it.
"Dude I heard you went home with Tina last night. She is banging."
"Dude, not really..."
"What are you talking about, she looked so good in those true religion jeans and that baby tee..."
"Dude when we got back to my place...let's just say I was in for a surprise."
"Oh no, she's a fat smuggler."
"Dude, total fat smuggler..."
A friend or confident of your ex that goes to the same parties/gatherings as you and informs your ex what you were doing and who you were with at said function. Ultimately, your ex will show as to send and icy cold/frosty stare to you that would make kittens cry.
"Dude don't look now but Tina just got here."
"Seriously. Dude there's a reason why I go to the university crew team parties now, she doesn't know anyone here."
"Don't be so sure dude, Valeria is here. She's sleeping with some dude on crew."
"Damn ninja popping out of the planter over there must have talked to her."