ninja bone 

when you look at some one across the room with eyes almost squinted shut in true ninja style

the pug under the table thinks I don't see he's awake and ninja bone me

ninja bone by nicole marris October 24, 2008

Ninja Boner

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.

Ninja Boner by Massive Jones June 7, 2007