When your girl is so embarrassing that you can't fathom the idea of taking her to dinner Mon-Thurs or out for a night on the town Fri/Sat. She is strictly for that lazy, couch potatoing, not speding money, nobody-can-see-her-granny-panties-from-inside Sunday!
Joey: "Hey man, you bringing Kelly to the Mid this weekend?"

Evan: "F*ck that noise, bro. Kelly's a Sunday Chick."
by russtm July 8, 2014
Get the sunday chick mug.