Top definition
n. A marathon which the runner decides to run at the last minute and which is generally unannounced to his/her running mates.
John: Did you know Marty ran a marathon yesterday?
Pat: Marty is always running sneakathons.
by THW November 02, 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