The imaginary bass string linking your arse hole and and bowel system. When breaking wind, this gives a pleasing bass like tone. A fart string remains in-tact on most heterosexual men, not the case for homosexuals.
Straight person commenting on homo: That guys fartstring has been well snapped.

OR

That guys fart string is hanging out of the back of his pants.
by JackDaFlash May 17, 2006
5 Words related to fart string

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