top up

Verb

top up (third-person singular simple present tops up, present participle topping up, simple past and past participle topped up)

1. (ambitransitive) To refill (or recharge) something.
   • I shall top up with petrol before the long trip.
   • Please top up the tank tonight.

   Synonyms:

   top off

   1. (ambitransitive, idiomatic) To add to a balance in an account (e.g., mobile payment, debit card, bank account).
      • I shall top up the mobile phone at the supermarket.
      • Users can top up their wallet balance and start sending and receiving money between mobile phones.
   2. (UK, ambitransitive) To refill a drink.
      • The waitress topped up my coffee every few minutes.
   3. (ambitransitive) To add to a number or amount, to bring something up to a certain level.
2. (ambitransitive, slang) To have sex (with).
   • We had dinner, went back to her place, and started topping up.

   Synonyms:

   tup