A frequently-used discreet word for "masturbating". It
may be used in reference to a male or
female, and it also
may be used when it is done by oneself or by someone else.
If you're in polite company, you would use the subtle word "stroking" instead of the blunt terms "masturbating" or "wanking".
Mum: Did you take Charlie his
dinner?
Cheryl: No, I couldn't go in. He was
busy.
Mum: What do you mean "
busy"? If he's busy, you can still take it in, can't you?
Cheryl: No, he needs his privacy. He was, um... busy stroking himself, Mum.