Green’s Dictionary of Slang

mall v.

[on the mallet(t) under mallet n.2 ]

(UK Und.) to give credit.

[UK]Swell’s Night Guide 67: The gorgeress, Mother Ruckers, is in no way less notorious than is the crib. [...] shes fly to every fakement and cross dodge [...] vill have her tin, cos malling of it, von’t furnish monjary broad.