Synonyms of 'trifle with'
'Don't trifle with me,' was my attitude.
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If you dawdle, you spend more time than is necessary going somewhere.
They dawdled arm in arm past the shopfronts.
My mother used to flirt with nationalism.
Thesaurus for trifle with from the Collins English Thesaurus
If you say that someone is not a person to be trifled with , you are indicating to other people that they must treat that person with respect.