A girl who would not be considered a 10 under normal circumstances, but is a 10 due to the simple fact that she is in a fast food restaurant lobby where hot girls usually don't hang out.
Bro #1: Bro, check out that girl in the line that just ordered a double-double and fries!
Bro #2: Dude, she's a straight up In-N-Out 10!
Bro #2: Dude, she's a straight up In-N-Out 10!
by klmatthews20 February 22, 2014
Get the In-N-Out 10mug.