Y2K
Y2K definition by Slang.net
This page explains what the acronym "Y2K" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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People may send "Y2K" in a message online or text to say "thank you" for a kind gesture. The acronym stands for "you're too kind," with the 2 representing "too."
An example of when you might receive Y2K is when your friend texts you their thanks to you for helping them study. Or, a co-worker may message you "Y2K when you wish them a happy birthday.
Most people do not send Y2K because many people confuse it with the abbreviation for "Year 2000." Instead, they typically send thx, TY, tnx, or thnq.