mess about

blbnout
(brit. angl.) with - s čím, nebo např. "Immediately she'd gone, the boys started to mess about." (Jakmile odešla, kluci začali blbnout/vyvádět.)
"I don't want him coming in here and messing about with our computer." (Já nechci, aby sem chodil a blbnul s našim počítačem.)