phrasal verb → smarten If you smarten yourself or a place up, you make yourself or the place look neater and tidier.
[V P n] ⇒ ...a 10-year programme to smarten up the London Underground.
[V n P] ⇒ She had wisely smartened herself up.
[V P] ⇒ ...a medical student who refused to smarten up.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers