have a gas

good-time Charlie

An affable or happy-go-lucky carefree convivial man.

have a whale of a time

To enjoy oneself greatly: to have a very good time.

keep good time

To be punctual.

in one's own good time

At one's own pace; at a pace unaffected by external influence; unhurri…

have a good time of it

Synonym of have an easy time of it.

show someone a good time

To sleep with; have sex with.