Top definition
A phrase used by biology nerds in place of my bad.
Jessica: "You broke my slide of a rare deuteromycota!"
Marcus: "Whoops. My celium."
by Sarahhh December 15, 2005
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