Shank - knife or stab. "I will fucking shank you bruv"
Butters - ugly.
Sket - slut/slag.
Fam/famo - abbreviation of family, but used to describe "your crew".
Endz - your area "I come from the endz fam"
Brap - useless filler word "brap brap fam, your sket is butters"
Blud - used the same way groups of friends in the USA might use the N word/blood brother. Can be aggressive or friendly.
Wagwan - what's going on?
Bare - a lot/great