You say this word when you have been labeled as something that you dislike, insulted, or annoyed in general.
It means "Seriously, you had too?" usually the ? is already implied
Sam: you seem very stupid today
Mindo: Wow, Syht?
Don't ask why I did that cause I don't know either
Other forms are IDKE and WK meaning "I don't know either" and "Who knows"
Also DAWIDT meaning "Don't ask why I did that" and CIDK "Cause I don't know"
Simply used when you thought about an action or word before doing/saying it and it may be harmful or stupid, but despite your thinking, you did it anyway and are unsure on why yourself.
Jerry drops a glass of water for fun but actually did think it through before doing it but did it anyway
Amy: Why did you do that?
Jerry: Don't ask why I did that cause I don't know either
Text
Sam: Hey why did you make a random definition up on a website
Lily: DAWIDTCIDKE
Sam: huh...ok