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1 definition by Neil and Bob

 
1.
to perform fellatio (oral sex on a man)
"What the heck are those two doing in there? I've been waiting to use the bathroom for over 20 minutes!"

"Maybe she's chomping his knob."

"What does that mean?"

"You know, suck the cock, chomp the knob -- same thing!"
by Neil and Bob November 26, 2006