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A phase during adulthood when a man first develops moobs. Usually begins in mid to late 30s but has been known to happen in late 20s in some male office workers.
Larry: Holy crap Frank, I didn't know you'd reached mooberty already, your moobs are huge!

Frank: yeah it sucks, I've started getting moobsweat too. I wish my mother would buy me my first man bra.
by Clive London November 06, 2007
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