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1.
verb.

1. To stick something up your ass if you're a straight man.
2. To have your hottie stick something up your ass if you're a straight man.

noun.
1. The object that is stuck in your ass.
verb
1. Damn, when I was opkokin the phone rang and I had to awkwardly waddle to answer in time.
2. Last night I was almost ready to cum, but then she opkoked me and I skeeted everywhere!

noun
1. A nice straight hot dog can be an opkok.
by Gary Pizzle March 19, 2004
 
2.
When one male inserts his penis into the rectum of another male. This word is synonymous with the phrase "butt plundering."
Man, I can hardly get any sleep on Friday nights when Leeroy is opkokking his male friend in the apartment adjacent to mine.
by Leeroy Jones March 19, 2004