Top Definition
To reply to a text received while asleep. Usually one word answers or nonsensical responses occur, with misspellings.

Much like sleepwalking, the sleep-texter will not remember the incident until the morning after, upon checking thier sent/inbox.
1. Friend of sleeptexter:"Hey, you're missing an awesome party right now!"

Sleeptexter's response: "Mm yeahg i knsh."

2. "Yeah, I tried texting her last night but she was just sleeptexting back, so it was useless."
by mousefacee December 08, 2009

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