DYKWYMTH

'Don't you know what you mean to him'. It's a phrase from HYYH The Notes. Yoonkookers (and sometimes non-Yoonkookers) use it to hurt each other's feelings on Twitter.

Yoonkooker 1: DYKWYMTH?
Yoonkooker 2: *quietly breaks down into tears*

by niqhtyoonqi March 31, 2021