Green’s Dictionary of Slang

bub n.3

[SE bubby, a little boy]

1. (US) a boy, esp. when used as derog. form of address, implying youth, insignificance etc.

[US]C.F. Briggs Adventures of Harry Franco II 189: ‘Speak louder, Bub,’ said one of the vice presidents encouragingly.
[US]‘Mark Twain’ Roughing It 51: The cayote turns, [...] and [...] seems to say: ‘Well, I shall have to tear myself away from you, bub – business is business.’.
[US]G.W. Peck Peck’s Boss Book 159: Come, bub, we will go down to the candy store.
[US]Indian Advocate (Sacred Heart, OK) 1 July 78/2: Bub, I’m looking for a youth about two heads taller than you.
[US]S.E. White Arizona Nights 111: Sorry to disturb your repose, bub.
[US]O. Johnson Varmint 13: Say, Bub [...] You’re goin’ to have a great time at this little backwoods school.
[Aus]E. Dyson ‘An Amorous Boy’ in Benno and Some of the Push 175: A stinker boy’s a bub et school what won’t fight nothin’, smooges t’ the teachers, narks everythin’, ’n’s clean an’ pretty alwiz.
[US] in R. Butterfield Sat. Eve. Post Treasury (1954) 1 July 267: Open the door, bub, so’s we can hear.
[US]J. Conroy Disinherited 182: What you crying for, bub?
[US]C.B. Davis Rebellion of Leo McGuire (1953) 13: ‘Look, bub,’ the policeman said, ‘Why aren’t you in school today?’.
[US] in C. Hamilton Men of the Und. 179: Congratulations, bub, you’ve won a soap-bubble pipe!
[Ire]J.P. Donleavy Ginger Man (1958) 87: Say, bub, you’re a moral leper.
[US]T. Wolfe Electric Kool-Aid Acid Test (1969) 37: Well, bub, I dunno, I cain’t exactly go along with you there.
[US]L. Heinemann Close Quarters (1987) 139: What’ll ya have, bub?
[UK]W. Boyd ‘Not Yet, Jayette’ in On the Yankee Station (1982) 19: Oh he left five minutes ago, bub.
[US]B Hamper Rivethead (1992) 196: Go inseminate a tractor, bub.
(con. 1916) R Doyle A Star Called Henry (2000) 131: You’re not locking me out, bub, I said.
[US]S. King Dreamcatcher 470: Push the buttons, bub.
[US]J. Stahl Pain Killers 76: C’mon, bub, what are you doing in there?
[US](con. 1954) ‘Jack Tunney’ Tomato Can Comeback [ebook] Kolodzei made a cutting motion with his hand [...] ‘Radio silence, bub’ [...] ‘You just keep those drinks comin’ bub, and I’ll tell you all kindsa stuff’.

2. (Aus. / N.Z. ) a baby.

[NZ]N.Z. Observer 4 Feb. 5/1: [caption] Little Bub: Mamma my stomach aches.
[Aus]C. Bowles G’DAY 44: She’s too young dava bub. Should’ve adder boiler scraped when she adder chance.
[Aus](con. 1945–6) P. Doyle Devil’s Jump (2008) 203: Mid afternoon, May and cec took the bub out for a stroll.
[Aus]T. Spicer Good Girl Stripped Bare 240: ‘It’s bad timing with a bub on the way’.

3. (US campus) a person devoid of redeeming qualities.

[US]P. Munro Sl. U. 46: That guy has no friends because he is such a bub.
[US]F. Kellerman Stalker (2001) 216: The bastard was pretending not to see her. You’re not going anywhere, bub.