The Brief: High key is a way to describe something that is a big deal.

Bluesquiggle
DEEP DIVE

High key, also stylized as high-key or highkey, is an adjective meaning “very much.” It is used to put emphasis on something, drawing attention to it. High-key is an antonym for low-key. The two words are often used in tandem with each other, thus canceling each other out while conveying mixed feelings about something.

Yeah, low-key or maybe high-key
I been peeped that you like me, you know? –Drake, “Only”