Definition of on the sly in English:

on the sly

In a secretive fashion: she was drinking on the sly
More example sentences
  • Unfortunately, the train to my conference left at 4 AM after a night spent trying to acquire a travel visa on the sly, which meant drinking a lot of vodka.
  • And there still is such a thing as scavenging on the sly - sneaking into dumpsters for the great find.
  • Younger and wirier than his charge, talking a mile a minute and singing during his chores, he nonetheless shows a careworn, weary face, and he drinks on the sly.
Synonyms
See parent entry: sly

Definition of on the sly in:

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Word of the day nous
Pronunciation: naʊs
noun
common sense; practical intelligence