LMK
Let me know
Example
LMK what you're doing next Saturday.
LMK means let me know
LMK definition by Slang.net
This page explains what the acronym "LMK" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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LMK means let me know. It is an acronym that can be used as a single statement or at the beginning of a sentence. LMK may also be translated, "letting me know," as in "Thx 4 lmk."