noun
dumbo
DUHM-boh
noun
1
(informal, mildly insulting) A stupid or foolish person.
"Nice one, dumbo — you locked the keys in the car again."
How to Use Dumbo
Learner’s notesIn plain EnglishA casual, often affectionate way of calling someone silly or foolish.
When to use it
Informal; can be teasing between friends or mildly insulting depending on tone.
Word Forms
dumbos plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “dumbo”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
Nice one, _____ — you locked the keys in the car again.
Etymology
From "dumb" plus the informal suffix "-o," used to form casual or mocking nicknames (compare "weirdo," "wino").