Top definition
When future sisters-in-law come together to celebrate Christmas a month early, with many wines and much merriment.
I cannot wait until Sistmas this Saturday night, I'm going to get festively wasted.
by TryTribes November 28, 2011
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