1 definition by xXFuckPrettyXx

Top Definition
a underground word for a girl's period.

Girl1: Are you okay? You seem pissy.
Girl2: i'm on my sum sum
Girl1: ohhhhhhhhh
by xXFuckPrettyXx August 03, 2008

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