english
1
general::
Phrase(s): fly off the handle Fig. to lose one’s temper. • Every time anyone mentions taxes, Mrs. Brown flies off the handle. • If she keeps flying off the handle like that, she’ll have a heart attack.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Lose one's temper, as in Tom flies off the handle at the slightest set-back. This metaphoric expression alludes to the loosened head of a hammer flying off after a blow. [Early 1800s]
American Heritage Idioms