morning after shirt 

A dude's button up shirt commonly put on by a girl when she wakes up the morning after

Damn she looks even hotter in the morning after shirt than she did last night.

morning after shirt by Baby Octane October 9, 2017

Morning After Tee Shirt 

A Morning After Tee Shirt is when you where the tee shirt of the last person you had sexual intercourse with the next day to work or school.

Girl 1: Ew. Why are you wearing that ugly boys shirt?

Girl 2: No. It's my Morning After Tee Shirt from Dan.

Girl 1: Oh. Makes more sense now.

Morning After Tee Shirt by Icey0123 March 16, 2010