Top Definition
when you cough and an unexpected heaving stockpile of pure, vile, chunky lung waste splatters into your mouth. Immediate action must be taken to rid yourself of this evil misfortune by spewing out this busting chunk onto the carpet/wall/spouse.
"the new guy at work is such a twat i just flobbed a massive flem chunk in his tea"
by josh June 16, 2006

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