mess around with
US /mes əˈraʊnd wɪθ/
UK /mes əˈraʊnd wɪθ/

1.
jugar con, trastear con
to spend time idly or unproductively
:
•
He likes to mess around with his computer on weekends.
Le gusta jugar con su computadora los fines de semana.
•
Don't mess around with that old engine if you don't know what you're doing.
No juegues con ese motor viejo si no sabes lo que estás haciendo.
2.
liarse con, jugar con
to have a casual sexual relationship with someone
:
•
I heard he's been messing around with someone from work.
Escuché que ha estado liándose con alguien del trabajo.
•
She warned him not to mess around with her feelings.
Ella le advirtió que no jugara con sus sentimientos.