Not P but yet another English question

[Mike Jing]

The following excerpt is from David Foster Wallace's *Big Red Son *(from*
Consider the Lobster and Other Essays*):

Whereupon in turn Ms. Jasmin St. Claire, seeing Harold Hecuba clutching the
upraised hand of an agitated and off-balance Nici Sterling, performed a
set-pick off the three-foot width of Ron (“the Hedge-hog”) Jeremy and leapt
on Hecuba’s back and deployed what Filth averred was a pretty authentic-
and impressive-looking LAPD-style chokehold

What is a "set-pick"?