banjax = Verb. To ruin. [Mainly Irish use.] N use that all the time
boy racer = Noun. A young man who has a penchant for fast cars and reckless driving. English term for Ricer
mutt's nuts = Noun. The best, most excellent. Cf. 'dog's bollocks'.
salad dodger = Noun. A fat person Doug.
shove it up your arse! = Exclam. An exclamation of contempt
thick as a brick = Very stupid.
thick as pig**** = Very stupid.
thick as two short planks = Very stupid.
phwoah = Exclam. Used to express sexual desire at the sight of an attractive woman. Imitative of the sound expressed in such a circumstance. Also spelt phwoar and phwoargh (my fav)