Definitions
Set to a particular key, pitch, code or mood.
Word origin
Most likely simply from the verb key; in slang perhaps connected to the "securing" action of a lock and key (compare e.g. scored).
Used in a sentence
“OP is keyed as fuck”
“Holy keyed.”
“[Chorus:Michael Marshall] I got 5 on it (got it, good), grab your 40 let’s get keyed. I got 5 on it, messin’ with that Indo weed.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Set to a pitch”5 letters
Not quite right?
"Search similar patterns."
K____