Definition of bosh
: foolish talk or activity : nonsense —often used interjectionally
Examples of bosh in a sentence
Don't believe a word she says—it's all bosh.
a pseudoscientific examination of UFO claims that was utter bosh
Origin and Etymology of bosh
First Known Use: 1829
BOSH Defined for English Language Learners
Definition of bosh for English Language Learners
: foolish words or ideas
Seen and Heard
What made you want to look up bosh? Please tell us where you read or heard it (including the quote, if possible).