a particularly nasty smelling fart that lingers in the room for several minutes after being emitted from the anus; flatulence
Evonna has some major swamp gas today! She farted over five minutes ago and I can still smell it!
ayon kay Krazy K ika-21 ng Disyembre, 2002
FBI code word for ghosts and/or UFOs
nothing to worry about here, just some swamp gas caused a flare in the atmosphere...
ayon kay somethingplex1 ika-26 ng Disyembre, 2011
Methane like odor that lingers in the air after a coworker rips a nasty fart.
Claude filled the office with swamp gas today. It was horrible.
ayon kay DamnCorkins ika-17 ng Abril, 2015
The stinky, uncomfortable farts and shits sometimes suffered after a long night of drinking lots of beer.
ayon kay Leoton ika-11 ng Setyembre, 2010