(わる)ふざけ

わるふざけ
noun
prank; mischief; practical joke (that goes too far)
action
1. prank; mischief; practical joke (that goes too far)
Playful or joking behavior that crosses the line into being harmful, disruptive, or inappropriate. Stronger than simple ふざけ — implies the behavior has negative consequences or is in poor taste.
(わる)ふざけはやめなさい
Stop that mischief.
Someone got hurt because of a prank.
The children's pranks escalated, and they were severely scolded by the teacher.

Usage

Implies behavior that has crossed a line — it's not innocent fun but mischief that causes problems. Often used by adults criticizing children's behavior, or in news reports about pranks that caused damage or injury.

Common collocations

Similar words