Kuraokami showed Sitri a trick so his chopsticks stop slipping from his fingers- wrapping a tissue around them. Lucifer decided to do the same, as he was about to drop his eating utensils as well.

Satan, noticing it: Hah, caught you in 4K. Loser.

Lucifer: *glares at him and kicks his shin bone* Cut it out, moron.

Satan: Ow-

Kura: Show me what you got then. Can you use chopsticks?

Satan: 'course I can. Watch me. *picks up the chop sticks perfectly fine and eats with them.* See? Easy peasy lemon squeezy.

Kura: Wow. You're a chopstick natural.

Lucifer: I'm actually surprised someone who's shattered at least three separate sets from my cupboard with their two left hands can do that.

Satan: Oh... you know that my left hand is my strong hand, right, Lucy? *winks

Lucifer: *just stares at Satan for a couple of seconds, processing the fact he just got beaten by his brother