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A person with no butt. Who's THighs are connected to their bACK because there is no butt in between to separate them.
Lauren is a thacker.
by Kate February 08, 2004
the act of a woman releasing cum from her asshole that was shot into her after butt fucking.
the cum with usually appear greenish-brownish-yellow.
dude, thackers are nasty.
by ian April 29, 2004