Magooshka

A real schmuck, a putz, someone who is the opposite of a mensh.

Emma, your grandmother keeps chasing that poor magooshka with a sledgehammer!

Grathser copycentre

When you go to the print or copy room of a business, and the staff are all lounging on the floor, hammered drunk, pissed outta their minds, just like Paul McGrath, then that area is known as a 'Grathser copycentre'.

You: Dessie can I have 3 reams for our printer?
Dessie: Ah go and ask me bollix ya bald hoor.
Yo: This is such a flamin' Grathser copycentre.

Shennis

The revolutionary act of taking a sneaky dump in the middle of a tennis court late at night. Made popular by Anthony Hopkins in Swansea, 1992.

Anthony Hopkins: "I played a superb singles game of 'Les Dennis' last night on centre court."

Jodie Foster: "Is that your British rhyming slang for 'shennis'?"

Hopkins: "Yeah it is! It's exciting"

Foster: "Yeah I LOVE shennis!"