Definition of look as if butter wouldn't melt in one's mouth in English:

look as if butter wouldn't melt in one's mouth

phrase

informal
  • Appear gentle or innocent while typically being the opposite.

    • ‘Because, while he may often look as if butter wouldn't melt in his mouth, underneath the boyish appearance and the trappings of trendiness, there is a genuinely steely determination that has to be admired.’
    • ‘For all they look as if butter wouldn't melt in their mouths, they're an un-Christian lot.’
    • ‘All sweet and coy on the surface as if butter wouldn't melt, but look a little deeper my friends; Ms. Sorisso is a minx.’
    • ‘He looks as if butter wouldn't melt in his mouth, but he angled against Kennedy and now he's doing it against Campbell.’
    • ‘At home, he's placid and gentle and happy and looks as if butter wouldn't melt in his mouth.’