It's no surprise that different locations have different phrases. According to Elite Daily, here are a few different phrases that either mean that you're having sex with someone or having sex on your own:
1. UK English
This doesn't sound as pleasant as it actually is.
At least this phrase sounds sweet and innocent.
You've heard this one a million times before.
For some reason, masturbation terms are never as elegant as sex terms.
5. UK English
You might've heard this one before, because it's been around for ages.
This doesn't sound nearly as dirty as it actually is.
Here's another weird mental image for you.
At least this one sounds like a fun game.