Explosive and noxious flatulence following a crab feast; powerful gas.
Thad's crabgas was so bad that I knocked over the Old Bay seasoning while scrambling to pinch my nose shut.
by Chris Hops September 25, 2007
Flatulence resulting from ingesting shellfish.
After he finished off that bushel of crabs, his crabgas was so noxious that we had to pull over and put the top down on the convertible
by C Hop October 09, 2007