interj. (context slang US English) Expresses negative feeling. The quality of the emotion expressed is more negative than that of 'blah' and has a slight feeling of disgust, verging on nausea.
Usage examples of "bleah".
When she’d realized that, she had almost turned around and walked out, but the secretary had called her name, and the doctor (Sharon, her nametag read, with a blue smiley face in the ‘o’, how’s that for a big bleah?