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1.
A bloke who talks about having sex, but lacks the balls to do it.
"Dave keeps promising to give me a great sex session, but bottled out of it. He's all talk and no trousers!"
by Scratchibum February 05, 2014

Words related to All talk and no trousers

no sex talk trousers all and banged bottle let-down
 
2.
When someone talks about someone else in a way that would suggest that they had slept with someone, but had in fact not.
Dude 1: I banged her so hard last night!!!
Dude 2: Haha!!! Really?
Dude 3: Man... you're all talk and no trousers
by BigBadDoc March 12, 2012