paint the town red
CELEBRATE, carouse, enjoy oneself, have a good/wild time, have a party, go out on the town, whoop it up, make whoopee, live it up, party, have a ball, push the boat out

[TahlilGaran] Dictionary of Contemporary English ▲

paint the town red
paint the town (red)
to go out and celebrate without control.
Jack finished his exams today so he's gone out to paint the town red.

Usage notes: usually said about celebrations that include a lot of drinking
[informal]
to go out and enjoy yourself in the evening, often drinking a lot of alcohol and dancing.
Jack finished his exams today so he's gone out to paint the town red.

[TahlilGaran] English Idioms Dictionary ▲

paint the town red
to go out and party and have a good time
We decided to go out and paint the town red after we passed our exams.

When my cousin came to visit us we decided to go out and paint the town red.

[TahlilGaran] English Idioms Dictionary ▲

paint the town red
v. phr., slang To go out to drink and have a good time; celebrate wildly; carouse.
It was the sailors' first night ashore; they painted the town red.
Compare: ON THE TOWN².

[TahlilGaran] English Idioms Dictionary ▲