A lad takes his girlfriend home to meet his parents but before they go in he warns his girlfriend "Both my parents are deaf and dumb" ..
they go in and the lad's mum is sat there with a beer bottle in her f*nny, and his dad is sat there with his balls out and a matchstick in his eyelid.
The lad's girlfriend says "What the f#ck is going on here?" the lad replies..
"Oh don't worry, its sign language.. my mum is saying get the beers in you c*nt and my dad is saying boll*cks, I'm watching the match!!!"