Green’s Dictionary of Slang

1. an outstanding example.

c.1905

J. Furphy Rigby’s Romance (1921) Ch. xxxviii: 🌐 You look’s as if you was gone on her? Can’t blame you — fact, I give you credit. She’s a ding-donger.

2. (US Und., also ding-dong) a house-to-house beggar [ding-dong v.].

1949		Monteleone Criminal Sl. (rev. edn).
1950		Goldin et al. DAUL 58/2: Ding-dong. (Hobo) A panhandler [...] Ding-donger. A hard-striving and successful thief or mendicant.
1960, 1975		Wentworth & Flexner DAS.

3. (US) one who enjoys hedonistic pleasures to excess [ding-dong n.⁵ (4)].

1990

S. Morgan Homeboy 136: It was only an hour until closing, and only diehard dingdongers still drank.