"mistake," 1954, apparently a reduplication of boob "stupid person," which had acquired a secondary sense of "foolish mistake" (1934). In 1930s it was the nickname of Philadelphia gangster Max "Boo-Boo" Hoff.
bon-vivant
bony
boo
boob
boob tube
boo-boo
boobs
booby
boodle
booger
boogie
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