What is your definition of fuck with?

There are different definitions of this term. Here’s what my definition is.

If you’re talking to someone then you’re fucking with someone (which is why when some people are asked if they’re single they say “yes but I’m talking to someone” or just respond with “I’m talking to someone”)

You fuck with someone before dating which leads up to the relationship (talking stage is fw them)

It can also mean messing with (kissing, touching, possibly fucking)

Or it could mean you just mess with that person (not sexually but just as friends.)

Fucking with someone doesn’t just mean sleeping with them.

What’s your definition?