Definition:
Low-key means to keep something quiet or not draw too much attention to it. It can also mean to do something in a relaxed or casual manner.
Use case:
You can use low-key when you want to describe doing something without making a big deal about it. For example, "I'm just low-key hanging out at home tonight" means that you're staying at home without any particular plans or excitement. Or, "Let's keep this low-key" means that you want to keep something low-profile or not draw too much attention to it.
• Low key, I think I left my phone at home, can you call it for me?
• I low key can't stand his attitude, but I have to work with him, so I keep it professional.
• Low key, I think she's the one for me, but I don't want to put too much pressure on her.
• Low key, I'm nervous about the presentation tomorrow, but I'm trying to stay positive.
• I low key love pizza, it's my guilty pleasure.
• I'm low key obsessed with this new band, I've been listening to them non-stop.