Custom Shoe Size 

The insertion of a male's foot into a female's vagina while the girl is extremely trashed, whereas the man will then walk around using the female as a shoe

"Man, these shoes never seem to fit!!! I think I will take Mary's offer of giving her a custom shoe size."

"I had sex with you mom last night!!!"
"Oh yeah?!! well i gave that bitch a custom shoe size!"

Custom Shoe Size by Purple Mist January 6, 2008