The meaning of Mess-around

phrasal verb

Behave in a silly or playful way.

Usage examples:

He lay there snoring so i thought he was messing around and told him to get up

phrasal verb

Engage in sexual activity casually or with someone other than one's spouse or partner.

Usage examples:

I found out he was messing around with my best friend

phrasal verb

Cause someone problems, especially by acting unfairly or indecisively.

Usage examples:

Get your own back—make him sorry he ever messed you around!

phrasal verb

To make changes in something, esp. in a way that harms it

Usage examples:

Has someone been messing around with the settings on my computer again?, you can’t mess around with…