Green’s Dictionary of Slang

drag ass v.

[SE drag + ass n. (4)]
(US)

1. (also drag arse) to go, to travel (the subtext is often of reluctance).

[US]L. Berg Prison Nurse (1964) 28: You hold out your hands and take your cut. But the minute things start getting tough you want to ‘drag arse’ out.
[US]I. Freeman Out of the Burning (1961) 123: Now drag ass home, all of you!
[US]H. Selby Jr Requiem for a Dream (1987) 82: She opened the door and Tyrone dragassed in.
[US]C. Stroud Close Pursuit (1988) 38: Kennedy has to get up at five in the morning [...] and dragass down to this shithole.
[US]T. Piccirilli Fever Kill 45: They’d [...] give him a chase before dragging ass back to whichever motel they were holed up in.
[UK]T. Black ‘Killing Time in Las Vegas’ in Killing Time in Las Vegas [ebook] Just a joy to be dragging ass across state for this kinda shit.

2. (also drag tail) to act slowly, lazily [note drag one’s tail under tail n.].

[US]E. Hunter Blackboard Jungle 297: Draggin’ yo’ ass in after the late bell, Chief. You settin’ a bad ’zample for the pupils here. [...] Wunt you draggin’ ass, man?
[US]R. Gover One Hundred Dollar Misunderstanding 63: This poor ol cat is draggin ass.
[US](con. 1920s) J. Thompson South of Heaven (1994) 187: Everyone was barely dragging tail.

3. to do badly.

[UK](con. 1940s) G. Morrill Dark Sea Running 97: If you drag ass on this job the lines will bury you.
[US]E. Torres After Hours 258: Joint was draggin ass. Wasn’t ten people in the place.