Homemade iced tea; Another way of telling someone you have iced tea that you made, the term comes from the fact that homemade iced tea looks like mop water and the joke that a waiter/waitress that does not like a customer will bring them their iced tea with dirty water usually from a bucket that was used to clean the floor with.
My friend asked me what I had to drink and I told him that I just made mopwater an hour ago if he wanted that.
a female dirtier than your average street walker, the town whore or your ex-boyfriends cheat; a more fragrant criticism than the use of the word "cunt"
Mr. Post declared his lady friend to be nothing finer or classier than mopwater.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.