a lesbian "player", generally of the more androgynous gender presentation and very charismatic.
Shane from the L-word is clearly a weasel in trousers.
by AuntF October 15, 2010
1 more definition
surprisingly charismatic butch-type lesbian who likes to make sexual advances on young doe-eyed mostly hetero girls
She's such a weasel in trousers she turns straight girls gay.
by AuntF November 03, 2010