sub
noun [ C ]
informal uk/sʌb/ us→ subscription :
You can save up to £20 if you pay your subs by direct debit.
→ substitute noun :
There is a great need both for permanent teachers and subs.
payment that your employer gives you earlier than usual because you need money:
I ran out of money on Thursday and had to ask my boss for a sub.
sub
verb [ T ]
uk/sʌb/ us-bb-to pay an employee earlier than usual because they need money:
He subbed him his wages because he had to buy a plane ticket.