Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
TWL06 (NASPA List 2006)
"Blech" Definition
interjection
An imitation of the sound of gagging, used to express disgust or disdain.
Source: Wiktionary
verb
To have the vomiting reflex triggered.
Source: Wiktionary
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