Backfuck

When a woman's shoulder blades are squeezed together, making a canal that is then fucked.
That girl was awesome, she let me backfuck her.
by Wordpioneer October 10, 2014
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Nipf

A sexual act in which the female inserts the tip of her nipple into the man's urethra.
I'm going to nipf my boyfriend tonight.
by Wordpioneer October 10, 2014
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