Short for "Need to Pee". Used mostly in instant messaging.
When you need to pee really bad, it's generally good if it doesn't take that long saying it.
Charlie: What did you think about the party last night?
Mike: NTP. Brb
*minute goes by*
Mike: Bib. Party was great!
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An internet short for "laughing so much I'm crying" Possibly made up by the youtuber "thewinekone" in his video "yours randomly"
More believable than ROFL
Mike: ... and then he ate it!
Charlie: LSMIC
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