Cliché: fair weather friend, a

Meaning: a friend during the good times (example 1, example 2)


Rewrite 1: clear-sky buddy
Rewrite 2: sunny times acquaintance
Rewrite 3: open bar reveler
Rewrite 4: bonus time colleague
Rewrite 5: glowing review co-star


Comment: I tried to envision both a range of good times and of friends to provide plenty of examples. I'll bet you can think of even more. 


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