The act of squirting saliva through the teeth; or being an enthusiastic Glee fan.
Present participle of 'gleek' formed by adding '-ing'. The base verb 'gleek' has murky origins but likely comes from onomatopoeia or Germanic languages where similar sounds represent spitting or spurting.
Gleeking is one of those skills some kids discover by accident and can't stop doing—much like how language features spread through social groups! The fact that we have a specific word for this particular spit-technique shows how humans name everything we do, no matter how oddly specific.
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