the.com/top banana

The one who gets the mic, the blame, and the last word.

means The lead performer or top person in charge — the one calling the shots in a group, business, or act.

from From old burlesque and vaudeville slang, where comedians were ranked by billing — the 'top banana' got the headline laughs, with a 'second banana' as the straight-man sidekick. The popular story ties it to a literal banana-shaped prop used in a classic stage gag, where the lead comic got the punchline with it — plausible, but no one's fully certain which routine started it. What's clear is the phrase stuck around after vaudeville faded, ripening into general slang for whoever's running the show.

origin
Vaudeville slang for lead comedian in a skit
sidekick
Second banana took the pratfalls, not the bows
usage today
Means boss, often said half-mockingly
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