mess around
US /mes əˈraʊnd/
UK /mes əˈraʊnd/

1.
장난치다, 빈둥거리다
to behave in a silly or playful way
:
•
Stop messing around and get your work done.
장난치지 말고 일이나 해.
•
The kids were messing around in the backyard.
아이들이 뒤뜰에서 장난치고 있었다.
2.
바람피우다, 가볍게 만나다
to have a casual sexual relationship with someone
:
•
He's been messing around with someone from work.
그는 직장 동료와 바람을 피우고 있다.
•
I heard they were messing around for a while before they got serious.
그들이 진지해지기 전에 한동안 가볍게 만났다고 들었어.