What it means
That mate who transforms after midnight into an unstoppable party creature, always the last one standing, always pushing for one more drink, one more bar, one more club. The kind of person who texts the group chat at 4am asking who is still out. Named after gremlins because, much like the film, you should never feed them after midnight. Every friend group has one.
Usage examples
"Don't invite Jake to a quiet drink because he's a proper sesh gremlin, last time we went for one pint and ended up in a kebab shop at sunrise."
"By three in the morning he was a full sesh-gremlin, demanding one more bar."
"Every group has a sesh-gremlin who hides everyone's coats so the night carries on."
"She's such a sesh gremlin, swore she was heading home at midnight then popped back up at 4 asking who's still moving."
"You can't bring a sesh gremlin to a chill pub night because somehow you'll end up chasing the last open spot in town."
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Where it comes from
Built from sesh, the clipped form of session meaning a long drinking or partying stretch, plus gremlin, the mischievous creature that wreaks havoc. The sesh-gremlin is the mate who turns feral after midnight and will not let the night end.
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