Idiom Definition:
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"to jump the gun"
to act hastily;
to do something before it should be done
Synonyms: abrupt,
breakneck,
brief,
frantic,
gone off half-cocked,
harum-scarum,
hasty,
headlong,
heedless,
hurried,
ill-advised,
impatient,
impetuous,
indiscreet,
jump the gun,
madcap,
off the hip,
off the top of head,
plunging,
precipitant,
quick,
rapid,
rash,
reckless,
refractory,
rushing,
subitaneous,
swift,
unanticipated,
uncontrolled,
unexpected,
unforeseen,
violent,
wilful,
without warning