with guns blazing
US /wɪθ ɡʌnz ˈbleɪzɪŋ/
UK /wɪθ ɡʌnz ˈbleɪzɪŋ/
1.
with great energy, enthusiasm, or aggression
:
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He entered the competition with guns blazing, determined to win.
•
The new CEO came into the company with guns blazing, making immediate changes.