English word dumbass unsurprisingly comes from English dumb and ass. It originated in the United States in 1970–75
| Dictionary entry | Language | Definition |
|---|---|---|
| ass | English (en) | The rear part of a person or animal. A donkey. |
| dumb | English (en) | (dated) To silence.. (transitive) To make stupid.. (transitive) To reduce the intellectual demands of.. (transitive) To represent as stupid. (dated) Silent; unaccompanied by words.. (dated) Unable to speak; lacking power of speech (kept in "deaf, dumb, and blind").. (figuratively) Pointless, foolish, lacking intellectual content or value.. (informal, pejorative, especially of a person) [...] |
| dumbass | English (en) | (US, vulgar, slang) A stupid or foolish person. Stupid, foolish. |