Literal meaning: disabled brain.
It is a group of six friends consisting of a jokester, a nerd, a prankster, a nerd, an artist, a makeup queen and a girl who has no job other than taking pictures and contemplating why she ended up with these people.
Also called DKL
"We're Dimaagh Ke langdhe (DKL) Cuz we share collectively a single braincell."