YMMD
YMMD definition by Slang.net
This page explains what the acronym "YMMD" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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When someone sends you YMMD (you made my day), it means you did something they really appreciate! Good on ya!
You might receive this acronym from an SO, BFF, family member, or co-worker after you've done something that brightens their day. For example, if you sent your mom flowers for Mother's Day, she might send you a pic of the bouquet and a text message that reads "YMMD - thank you!"