Green’s Dictionary of Slang

non-specific term of response, variously pos. and neg. depending on context.

2023

Sydney Morn. Herald 18 Nov. 🌐 Suddenly ‘bruh’ was my 10-year-old’s response to just about anything. It could be the verbal equivalent of an eye roll, or an interjection that meant anything from ‘wow’ to ‘yay’ to ‘d’uh!’ to ‘seriously?’.