Ok yes we talk about MBTI all the time I swear it isn't fully irrelevant because people still say this slang phrase quite a lot. Without context you might be like ..? so lemme explain it π
λ: you
T: T as in MBTI T
μΌ?: are you (in this context)
This phrase means "Are you T?" but in a pretty attacky/funny tone. It would definitely be used only with close friends...!!!
Being a T means your MBTI result has the letter T in it which means thinking! As opposed to F which is feeling. There is ALOT of slander towards Ts in Korea because they are known to have no empathy (not my words hahha) but basically if someone asks you λ T μΌ? they're basically saying: wow you really aren't empathizing with me rn.. or like are you fr rn? LOL use it carefully tho... only close friends
I personally use this phrase a lot and I swear if you do, you're going to sound 1000x more native !!! β€οΈ