Dumbo
来自Big Physics
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1950s (originally US): from dumb + -o, popularized by the 1941 cartoon film Dumbo .
wiktionary
dumb + -o
Blend of dumb + jumbo [1]
etymonline
dumbo
"stupid person," by 1951, American English, from dumb (adj.). The Disney musical cartoon is from 1941; in it the elephant's name is a mocking nickname based on Jumbo.
