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2.
A beer bong made out of the top half of a Sparkletts and excessively wide plastic tubing which is primarily used to dramatically improve the acoustics of a fart traveling through it.
We stayed up all night ripping em through our fartbong...and I don't think we were even drunk
by nutsaq February 07, 2003
 
1.
to fart in a botlle and inhale it
jonno just used this fart bong he found he doesn't know who farted in it though
by jasonjonno May 05, 2008
 
3.
to fart or get someone else to fart in a bootle close and breathe it in (note only gay tards do this)

poopookachho
jonno farted in that bottle and blain inhaled it what a fart bong er

poo in ur face
by poopoocachoo April 28, 2008
 
4.
An apparatus containing water through which human gasses pass.
A Bath, Jacuzzi, Swimming Pool, The Ocean, Your best mates pint of beer. e.g. "Dude you just used my pint as a fart bong"
by Roger the Goat Herder July 10, 2006