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A sexual act that involves an unexpected 69. Where the man is unwillingly placed in a position that involves oral sex on the female vagina.
Bob: "Last night i got caught off guard when my gf was giving me head. She swung her body around my dick, and told me to hop to it"--
Bob's Friend--"Dude, you got a Rusty McCumber??!!"
by dirtyPan February 21, 2011
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