One of my Spanish speaking students was asking me (I thought) about the difference between shit and sheet. He was asking me about something and I heard "Have a shit". As he is a mechanic and works in a garage I thought he was talking about the rough and ready language the 'blokes' use at work and proceeded to write "Have a shit" on the board. My students know that I will discuss any words and help them avoid embarrassment, for example can't/cunt etc.
As it turned out he was trying to say "Have a seat" but we all heard "Have a shit"!!! So he had been saying to all his customers "Have a shit" when he was offering them a seat whilst waiting for their car.
As it turned out he was trying to say "Have a seat" but we all heard "Have a shit"!!! So he had been saying to all his customers "Have a shit" when he was offering them a seat whilst waiting for their car.