Simply put, lesbian attitude. A kind of attitude only lesbians can really give... it reek of lesbianism (not neccesarily in a good or bad way.. it just... is very lesbian).
A woman who becomes opinionated (usually politically) after announcing they are gay. Lezbitarians are generally boring so their "coming out" is a big deal. Once the newness wears off they need something else to keep the attention, so they turn political.
Lezbitarian Rosie wants W. charged with war crimes for the invasion of Iraq. Just when I thought it was safe to watch daytime TV again...