A ninja boner is an erect penis that you must stealthily conceal whilst moving, which involves disguises and clever use of shadow and vegetation.
Often required when the words "Give it a minute" will not save you.
Last night Jen gave me such a ninja boner at the party, I had to creep around the outside of the garden in the dark to get a drink.
Received a text message, and heard your phone beep.
Contacted by pager
One sec dude I got a beep
"I got a beep from kim, and she can fuck all night" -Ice cube
© 1999-2015 Urban Dictionary ®
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