add fuel to the fire
US /æd ˈfjuːl tu ðə ˈfaɪər/
UK /æd ˈfjuːl tu ðə ˈfaɪər/
1.
to make a bad situation worse
:
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His angry comments only served to add fuel to the fire.
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Don't mention his ex-girlfriend; it will just add fuel to the fire.
to make a bad situation worse