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A toothless prostitute. While generally of the dirty, nasty meth whore variety, a gumstitute is known for their ability to perform a hot gummy.
Although he felt dirty and nasty after the deed, Carl could not shed himself of his penchant for weekly sessions with the local gumstitute. He just loves a hot gummy.
by Ben Dribblin December 09, 2016
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is one who does what another tells he/she to do (usually sexual-like) for gum (chewing or bubble, any flavor)

one who engages in sexual actions in return for repayment in the form of gum
He bought some more Hubba Bubba to pay the gumstitute in payment for flirting and possibly sex.
by ZeebaNeighba1 June 17, 2010
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