Green’s Dictionary of Slang

(US black) second-rate, inferior.

1915		Van Loan ‘Sporting Doctor’ in Taking the Count 25: Any tramp lightweight [...] can lick you now.
1969		‘Iceberg Slim’ Pimp 138: Sugar, were you going into this tramp joint?
1993		K. Scott Monster (1994) 258: They’d [...] demanded that Li’l Frogg ‘bring his tramp ass out.’.