Bleh vs. Blech

Blehinterjection

(slang) Used to reflect general indifference to a situation or topic.

Blehinterjection

(slang) An expression of mild disgust, possible imitative of vomiting

Blehadjective

(slang) Mildly uncomfortable; not good.

Blechinterjection

(slang) An imitation of the sound of gagging, used to express disgust or disdain.

Blechverb

(slang) To have the vomiting reflex triggered.

Blechnoun

(Judaism) A metal sheet used to cover stovetop burners on Shabbat to allow food to be kept warm without violating the prohibition against cooking.

Blech

A blech (from the Yiddish word בלעך (blekh) meaning or ) is a metal sheet used by many observant Jews to cover stovetop burners (and for some, the cooker's knobs and dials) on Shabbos (the Jewish Sabbath), as part of the precautions taken to avoid violating the halachic prohibition against cooking on the Sabbath.