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Wiktionary
slip by

vb. (context idiomatic intransitive English) to pass without having been taken advantage of.

WordNet
slip by

v. pass by; "three years elapsed" [syn: elapse, lapse, pass, glide by, slip away, go by, slide by, go along]

Usage examples of "slip by".

It stands to reason that, logically, for every person Starfleet catches, there must be others who slip by simply because their forgeries are more expert.

Then, also, he had ridden the streetcarsall night some nightssmelling the electricity, his dark eyes moving over the advertisements, feeling the wheels rumble under him, watching the little sleeping houses and big hotels slip by.

He wasn't going to let this opportunity slip by, soundproofing or no soundproofing.