Top definition
To have lots of fun with friends (A.K.A Bros).
Bro 1: I am having so much fun completing '10 Bros 1 Keg'.

Bro 2: Ya were are FAFing hard.
by Spurrberry September 07, 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