Oi oi, I'll rugby-kick the shit out your groin, boy
[The genre took] the name from the garbled “Oi!” that Stinky Turner of Cockney Rejects used to introduce the band’s songs. The word is an old Cockney expression, meaning hey or hello.
The “kick” part is referring to rugby and the kicks they use.
To help improve the meaning of these lyrics, visit "The Full Retard" by El-P Lyrics and leave a comment on the lyrics box