pronounced "Glee-shay": occurs when a person acts in a very unsurprising, predictable or otherwise overdone manner in regards to musical or theatrical performances, or else acts like one of the characters from the television show "Glee"
"For Katie's choir audition, she sang 'On my own.' Such a Gleeche! Who does she think she is-Rachel Berry?"
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a gleech can be anything. mostly used as a adjective, but can replace any noun or verb too.
"i just won the lottery!"
"hey, thats so gleech!
"hey, could you pass me can of gleech" (soda)
"uhhh sorry guys, im gleeching right now, so i cant hang out."
Originating from east London in late 2018 the word gleech shares similarities to the word fuck as it can be used in multiple variations
Such as
"Gleech off"
"I'd gleech that baddie"
"GLEECH!"