Top definition
Gap-flashsex (-0.479)
When a woman (or possibly a man) wears a button-down shirt that is a little too tight, resulting in the fabric straining at the buttons, and forming a gap. This allows friends, family, and/or the general public to have a glimpse of your side-boob.
"Oh man! That girl should really put a sweater on."

"Why?"

"Because she's totally gap-flashin' the entire coffee shop!"
by america's cynic January 27, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug