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1. A dumdum is a stupid person, as described above.

2. A dumdum is also an OLD name brand of a sucker in America.
1. That guy sure is a dumdum. *eyeroll*

2. My favorite kind of sucker is a dumdum.
DUMDUM by IrishDaddy2U April 12, 2010
A person who tells you sonething but if you didnt here it they wont tell you what they said
Dumdum: i know the meaning of life
You: what?
Dumdum: nothing!
Dumdum by Good_evening101 November 9, 2017
Used for a person when he/she shows just a momentary dumbness.
You: Wow, that's a lovely dog!
Me: That's a cat, dumdum!
dumdum by i am everest January 1, 2012
a word for a boyfriend that does stupid and/or annoying stuff that makes his girlfriend annoyed or mad at him
what did Dumdum do now?
DumDum by dance geek April 9, 2014
Zoë is a motherfcking idiot
Zoë forgot to sleep.
Zoë is a dumdum.
Dumdum by Orlandojames March 9, 2020
A drug that makes you retarded
Spencer’s our doing dumdums
Dumdum by Basicwhitegirl_2019 January 22, 2019