Meaning: to completely fill something like a glass or a container, or to increase the level of something like a phone cardSynonym: top off (American)
- top sth up A waiter was topping our drinks up whenever they needed it.
- top up sth What's the easiest way to top up a mobile phone card?
top up: glass, drink, kettle, tank, phone card, mobile phone, account
Excuse me, sir. Would you like me to top up