A lengthy black penis that hide up inside you're girlfriend's vagina. It is activated by the starlight at nighttime. It has a theme song and is a caped crusader against prudish straight male buttholes.
My girlfriend chased me around with her night dick.

I'm going to fuck you with my night dick.

Give the night dick a kiss, it will kiss you back.

My boyfriend is afraid of anal so I fought the crime and strapped on my night dick.
by Nightdicklover April 5, 2014
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Describes anything that is supremely hard.
Mom's biscuits are as hard as a wedding night dick.
by wolfbait51 April 13, 2011
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The act of "tapping" one's dick on the shoulder or chest of your friend or significant other on a Friday night.
Jeri did a sweet Friday Night Dick Tap on that chick's shoulder!
by nnyklebe June 6, 2009
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