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1.
while sitting on the can having bowel movement you have your girl give you a blow job.
"baby i forgot my magazine, get in here and give me a blunker"
by Anonymous August 30, 2003
 
2.
An improvised shelter used to hide from an excessively talkative coworker.
I saw Brian coming down the hall and knew I would never get to the meeting on time. I hit the blunker under my desk until he walked past.
by mistermog August 10, 2011
 
3.
stragne fart, with a sound of monstrous proportions, to a regular fart. Usually a powerfull fart, exhaled slowly, sounds like a speedboat engine.
"omg u smell that shit?"
"yeah, was a right blunker that wannit"
"indeed"
by Christian October 01, 2003