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1. ding-ding
1 n. small penis, refers to the tendency of small penises to bounce around easily even when erect. Possible derivative of "dinky", or referring to the "dinger" of a bell, which swings back and forth, causing the bell to ring. Generally a derogatory comment.

2. adj. Used to describe someone who is insane or "not quite all there" mentally.
1. When Jane saw Peter's ding-ding of a cock, she about fell out!

2. Jane is a bit of a ding-ding.
by Orion Feb 16, 2005 add a video
2. ding-ding
Slang term for penis.
Bam (after pantsing Novak): "Ahh, look at his ding-ding!"
3. ding-ding
A fucking idiot; a person lacking in common sense.
Man, that dude is such a ding-ding.
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