Top Definition
It's generally used to cook McDonalds food (mainly the fries, as they are submerged in it) and is what makes it so delicious. It's OK to eat some every once in awhile but can cause death (usually in the form of a heart attack) if enough is consumed. Eat at your own risk.
Joe: *starts eating McDonalds fries*
Dave: Stop! You're eating the McPoison!
Joe: These are the only fries I've eaten all week!
Dave: Alright then...
by Johnny Tambourine February 21, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

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

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×