informal

to be in a pleasant or successful situation.

'My wife does all the housework and cooking.' 'You're on to a good thing there!'

He's on to a good thing with this chauffeur service he runs. (often + with)

• fair-weather friend
• fairy godmother
• fait accompli
• fall afoul of
• fall afoul of someone
• fall afoul of something
• fall all over
• fall all over to
• fall all over to do something
• fall all over yourself
• fall all over yourself to
• fall all over yourself to do something
• fall apart
• fall asleep at the switch
• fall back on
• fall back on something
• fall between two stools
• fall by the wayside
• fall down on the job
• fallen angel
• fallen idol
• fallen woman
• fall flat
• fall flat on face
• fall flat on its face