Definitions by FactFinder

Gareth 

A British slang term for a particularly strong and addictive variety of marijuana, generally very expensive and rare.

Normal grass just isn't doing it for me at the moment, old chap... I think I'll procure some Gareth.

Gareth by FactFinder November 13, 2014

French Assault

Tongue-in-cheek colloquialism particularly popular in the United Kingdom to refer to the act of surrendering - to launch a "French assault" is to surrender. Associated with the surrender of Paris to invading German forces in 1940 and the subsequently collaborationism of the Vichy French Government.

We were all expecting a ruthless barrage that night, but instead the enemy offered little more than a French assault.

French Assault by FactFinder May 24, 2014

Plant 

A term referring to an asexual or celibate person, particularly in a derogatory context, derived from the asexual reproduction methods of plants.

Person 1: Oliver, why did you refuse to speak to your partner for the whole lesson?

Person 2: Because he fancies her...

Person 3: interjection Don't be ridiculous! Oliver's incapable of fancying anyone, he's a plant!

Plant by FactFinder May 4, 2014