Douglas Harper's Etymology Dictionary
Usage examples of "docksider".
Apparently the deal was that one of the bettors that bet with Sorkin through Fackelmann was a guy Gately and Fackelmann know only as Eighties Bill, an impeccably groomed guy that wore red suspenders under snazzy Zegna-brand menswear and tortoiseshell specs and Docksiders, an old-fashioned corporate take-overer and asset-plunderer, maybe fifty, with an Exchange Place office and a souvenir FREE MILKEN bumper sticker on his Beamer it was a night of many highballs and much papoosing, and Gately had to keep flicking the top of P.