Top definition
When your at a party and everyone is wasted and you shit infront of the toilet so they step in it.
I was soo wasted last night i didnt even notice i walked right into an under decker.
by Steve Trizzle April 01, 2008
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