Ш87
ПРОТИРАТЬ (ПРОСИЖИВАТЬ) ШТАНЫ
highly coll ,
humor or
ironVPsubj:
human to work or study long hours,
usu. very diligently (in refer, to a job - often a clerical one-or other occupation that the speaker considers unworthy of such diligence)
X протирает штаны - X wears out the seat of his pants.