An imitation of the sound of gagging, used to express disgust or disdain.(interjection)
To have the vomiting reflex triggered.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "blech" in a sentence
"For every moment of awe a writer has at seeing her book on a shelf, at being told by readers what comfort they found in your words, come the times when you read the word "blech" in a reader's review."
"A blech is a fitted sheet of aluminum that is designed to cover two adjacent gas burners."
"I admit the story was kinda "blech", but the movie was amusing and I liked it."