The Act Of Landing a Left/
Right Hook straight onto
the side of someone's head, when done effectively
knocking onto their ass. (Top/Head, Side/Hook).
'If this prick keeps pissin me off then he's gettin a straight topside slap'
Jack - 'There was this right prick
in the club last night'
Jon - 'Oh Yeah
what did you do about it?'
Jack - 'Oh
you know me, Just gave him a topside, that shut him up'
'Dont Watch That You'll Get a Topside' - Dizzee Rascal