A: What are you playing on your phone?

B: I’m playing “Angry Birds.” I am lowkey addicted to playing it.

A: Why “lowkey?”

B: Well, I don’t want people to know that I play this game popular among kids.

Note: The slang variant of low-key (often written without the hyphen as lowkey) functions as an adverb. “Lowkey” is typically used to describe a speaker’s desires or emotions. It retains the dictionary definition’s meaning of “of low intensity” and “not very emotional.” However, additionally, it can indicate something that is secretly (perhaps somewhat shamefully) wanted or felt by the speaker.