The slightest whiff of

English definition of “whiff”

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noun [C usually singular]     /wɪf/

› a slight smell, carried on a current of air:He leaned towards me and I caught/got a whiff of garlic.During the first few months of pregnancy the slightest whiff of food cooking made my stomach turn.a whiff of sth› a slight sign of something:They regularly hold elections without a whiff of corruption or violence.

(Definition of whiff noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Focus on the pronunciation of whiff

whiff of something 

1. . Lit. the smell or odor of something. (*Typically: get ~; catch ~; have ~; take ~; give someone ~.) Did you get a whiff of the turkey roasting? Yummy. I caught a whiff of something rather unpleasant in the attic. I think there is a dead mouse up there.

2. . Fig. a bit of knowledge of something. (*Typically: get ~; catch ~; give someone ~.) The boss got a whiff of the problems in the accounting department. No one will get a whiff of your trouble with the police. I'll see to that.