Top definition
When you stay up all damn night, just so you can catch McDonalds breakfast without a McLetdown
Damn, I'm tired
I pulled a Mcallnighter
lucky, I missed breakfast
by Hayden E. Kalke August 02, 2007
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