slum, v.¹ — Green’s Dictionary of Slang

slum v.¹

(UK Und.) to break into.

1718		C. Hitchin Regulator 19: To slum the Ken, alias to break into the House.
1719		A. Smith Lives of Most Notorious Highway-men, etc. (1926).
1768		(con. 1710–25) Tyburn Chronicle II in Groom (1999) xxviii: To Slum the Ken To break the House.
1786		Whole Art of Thieving [as cit. 1718].