1 definition by ThePhonk

Top Definition
A name given to a past-time in which people deliberately injure, or be-fool themselves and those surrounding for the purpose of entertainment.
Often filmed.
Such films are available on YouTube

Also:
Ack (to ack)
To ack is to deliberately injure, or be-fool yourself and those surrounding for the purpose of entertainment.
Dan: ack into that bin
Roh: okay
*acks*
Roh: oh shit, I'm in immense pain
Dan: but it's on film
All: god bless AckJassâ„¢
by ThePhonk September 30, 2007

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