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Male sexual organ.

Usually accompanied with a indication towards the crotch.

It was made famous by 'Give 'em Hell, Malone', a movie released in 2009.
Suck my Sinatra.
by whatevermakesyouhappy May 17, 2009
Male singer, born in Hoboken and a famous philosopher
Sartre: To do is to be
Descartes: To be is to do
Sinatra: Do be do be do
by Drewes Tebbes September 20, 2006
immense talent, bad-ass attitude, incredible emotion
Yea, good show, but it was no Sinatra.
by Grem1in November 23, 2008