Be tipping (it) down British spoken informal
Used to describe a heavy rain or a downpour
It is tipping it down and I forgot to bring an umbrella.
It was tipping it down here 30 minutes ago, so the traffic on the road has been very congested.
If it keeps tipping it down, I won't be able to visit my grandmother.
Rainy, wet weather
If the heavens open, it starts to rain heavily.
A heavy rain
A unusually severe or torrential rainfall of rain.
To rain heavily and at great length
The verb "be" should be conjugated according to its tense.
Said when one is looking back on something enjoyable or worthwhile in the moment that it was happening even though it was impermanent
The party came to an end, but it was fun while it lasted.