A colleague, who has come out with some classics, was explaining what a friend of hers did, and described him as "a car mantler".
After a bit of confusion from the rest of us, she explained it must be what he is because he doesn't take them apart, so he's obviously not a car dismantler.
The other quote from her, I set as a challenge. We can all appreciate a quick witted come back, and these are best if made straight away. But I reckon you need a lifetime to find a reply to this.
The colleague is attractive and breezed in with a new hair colour. "Wahay", says the office letch, "have you got matching collar and cuffs?"
Without breaking stride, the reply back was "silly bastard, do I look bald?".