DMY
DMY definition by Slang.net
This page explains what the acronym "DMY" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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If you're all worked up ATM, your friends may send you DMY ("don't mess yourself"). Literally, DMY means "don't poop and/or pee your pants."
In reality, however, DMY is just a prompt to calm down. Whether you're laughing too hard or you're a bit too angry, you may need to chillax if you've received DMY in a text or chat message.