let slide by

let someone slide by

Fig. to permit someone to get past a barrier or a challenge too easily. You let too many students slide by. You need to be more rigorous. Don't let even one unqualified person slide by!
See also: let, slide
References in periodicals archive ?
It seems like different groups or organizations pick and choose which issues to fuss and complain about, which sends contradictory messages about what's important and what people will let slide by.
Both the technology arena and the blue chip sector have benefited from a string of positive finishes, a streak the Dow let slide by afternoon dealings," stated Peter Antipatis.