Top definition
When you are dancing with a female and before you know it you have a semi-erect penis yet dance anyway.
John: Dude she gave me a semi, but she was still grinding on my shit!
Mark: Man I love semi-dancing.
by greek454 December 29, 2007
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