flip out

キレる To flip out – (used both with violence and shouting). Literally, it means ‘the string which is pulled too taught and breaks.’ A キレル-type flip-out is the result of a lot of stress which the person has been carrying inside for a long time, and finally a straw breaks the camel’s back, so to speak, and the person snaps. So the root cause of the flip-out is not usually obvious to people witnessing it.   $$$
(どなる) To get screaming mad at someone (usually a subordinate) for fucking up, i.e. you’re doing it for a specific reason, but your reaction is out of control.
ける(どなりつける) Like regular どなる but more.