look up any word, like swag:
 
1.
Suggestion that one REALLY blows. For use in meetings and on conference calls, company emails or IM's when:

1. An ambiguous or more politically or socially acceptable and less blatantly profane insult is required.

2. Suggestion that one is a enthusiastic fellatio expert.
Project Manager to person 1: Did you not read the standards?
person 1: I didn't know those applied to me.
person 2 to person 1: You're such a tuba rockstar

or

Guy 1: I finally got that chick in accounting to come over last night.
Guy2: Did you nail her?
Guy 1: No but I found out that she's a total tuba rockstar
by CTFO September 09, 2010