Frae Wikipedia, the free beuk o knawledge

A chantie-wrassler wis a preesoner that gat oot his cell earlier nor the ithers for tae gang roond collectin an tuimin the chanties o the ither preesoners. He wis weel-in wi the screws an a bit o a souk. Ye dinna hear the wird muckle nou, but it wis a mild term o abuiss, aiblins affectionate.