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The sexual act of two men docking inside of a female. One man inserts his penis in the vagina while the other slides his penis into the woman's anus. Where the two penises touch, the uncircumcised male stretches his foreskin over the head of the other male's penis.
Matt likes to indock.

I heard that Elton John once indocked.

David Bowie is famous for indocking.

I'm bored. Do you care to indock?
by G.T. IV December 30, 2009