Green’s Dictionary of Slang

1. to mug, to rob with violence.

1999		(con. 1979–80) A. Wheatle Brixton Rock (2004) 27: Going to a party and drapesing some bwai for his corn.
2001		(con. 1981) A. Wheatle East of Acre Lane 26: Drapes a handbag an’ t’ing off a girl.

2. to beat up.

1997		‘Q’ Deadmeat 46: Ah ready fi drapes im up an put chokey pun im.
2001		(con. 1981) A. Wheatle East of Acre Lane 6: I’m gonna drapes de bwai who sold me dat.
2011		J. Cornish Attack the Block [film script] 62: Drapsed by the feds? Yes. Big gorilla alien wolf monsters killin’ everyone? Uh-uh.