SMARTEN

up phrasal [verb] [I or M]If you smarten something up you make it smart.She's really smartened herself up since she left university. [T]You'll have to smarten up if you want to work in television. [I]A lot of money has been spent on smartening up the town centre. [M]The car wasn't in very good condition when we bought it, but we've managed to smarten it up quite nicely. [M]Why are you always so late for work? You'll have to smarten up your act (= make more effort) if you want to keep your job.