2 definitions by goo goo the magical elf

Top Definition
the ultimate engine, in which each bank fires simultaneously. it creates the most power when using gack as a fuel
wow my truck has a twinfirev8
by goo goo the magical elf November 26, 2010
Uranium by product and gouda cheese mixed together to create the one and only gack. Gack has the ability to be a tasty afternoon snack or can also perform shit rockets. shit rockets will expel chunky poo from your bum at speeds exceeding 200 mph, it will, rip your rectum in half.
WOW! I ate gack last night! and it blew my ass in half!
by goo goo the magical elf November 10, 2010

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.

×