When the two words "boggy" and "twat" are used together, it becomes a phrase that is used as an alternative way of calling someone any combination of basic swear words like f*cking b*tch, f*cking c*unt, dumb*ss b*tch, etc. This phrase is considered as a more humorous way of insulting someone and is usually used among friends as a joke
by I'm Sofa King Hard November 6, 2018