(No Bull Shit Intended) A term used to indicate to people that you are being truthful about your prior statement.
Guy1: See that guy over there?
Guy2: Yeah
Guy1: I banged his mum with a double ended dildo.
Guy2: NO WAY!!!
Guy1: N.B.S.I.
Guy2: Yeah
Guy1: I banged his mum with a double ended dildo.
Guy2: NO WAY!!!
Guy1: N.B.S.I.
by Ziggie Zertophf July 06, 2010