slap something on

Từ điển Oxford Advanced Learner 8th

ˌslap sth ˈon sth | ˌslap sthˈon derived
to spread sth on a surface in a quick, careless way
•Just slap some paint on the walls and it'll look fine.
•I'd better slap some make-up on before I go out.
Main entry: ↑slap_derived