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bub (n.1)

also bubby, familiar address for males, 1839, perhaps a variation of bud "a little boy" (1848), American English colloquial; perhaps from German bube "boy." But sometimes, along with bud, assumed to be a corruption of brother (compare buddy, bubba).

bub (n.)

"a woman's breast," 1860, short for bubby.

bub (n.2)

"strong drink of any kind," especially malt liquor, 1670s, perhaps imitative of the sound of drinking.

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