My eldest DS is 9 and has suddenly started swearing very badly, as well as using lots of silly toilet talk (everyone is a poo-poo or a poo face etc - very immature, I know). He does it mostly at his brother and sister when he is frustrated or cross with them and I really don't want the younger ones (6 and 3) to be on the receiving end. I generally send him to his bedroom when I hear him now because he has been warned that it is unacceptable on plenty of occasions. I never swear in front of the children but DH does quite often if he is cross about something, though he wishes he didn't and does try to hold his tongue most of the time.
I know from when I was that age that when you first discover swear words it feels 'big' to use them as much as possible so it may well be just a phase that he is going through but I am not prepared to stand back and wait for it to pass.
DS2 asked me what a 'gay-bender' was yesterday, obviously as a result of his older brother calling him one. It was bad enough when DS2 came home from nursery having learned the work fk and proceeded to shout it at the top of his voice over and over whilst in the garden, but I dealt with this by telling him it was not nice and I didn't want to hear it, then not rising when he tested me with it a few more times. Generally he doesn't swear except in mischief occasionally when he looking for a reaction, he delights in telling me that his little sister has said br when it is him who has told her to.
What do I do? Ignore him and risk the younger ones starting it, wash his mouth out with soap and water or continue to give him time-out sessions whenever I hear him?