Here are some possible English translations depending on the context:
* To play around
* To fool around
* To be mischievous
* To be silly
* To be playful
* To be giddy
* To be up to no good
Example:
* Tagalog: "Naghaharutan ang mga bata sa parke."
* English: "The children are playing around in the park."
The best translation will depend on the specific situation and the intended meaning.