Cost a packet British informal verb phrase
If something costs a packet, it has a very high price.
Look at that gorgeous gown. It must cost a packet.
That bag cost me a packet.
To change the price of something
Used to indicate something that is very expensive
Be very expensive
To refer to a very high price.
The verb "cost" must be conjugated according to its tense.
To be very wet
Because of forgetting bringing an umbrella, I look like a drowned rat when it rains.