Wiktionary
a. 1 Of or pertaining to masturbation (onanism) 2 In a manner which suggests masturbation; hence, fruitless, self-congratulatory, self-absorbed, pointless
Usage examples of "onanistic".
All the money went to putting on big fund-raisers that raised more money for yet more fund-raisers, in an endless cycle of onanistic vigor.
At one point two guys stood in front of the truck and screamed that I should engage in onanistic practices.
Gimpo was attacking his penis in an onanistic frenzy, his arm a juddering blur, eyes bulging, face blood-red.
Jacques had demanded her presence at the onanistic sessions he held with the Blake twins at their chalet.
Oedipal complexes, neuroses, guilt for onanistic abuse expressed by gambling bouts, sado-masochistic drives, and other fascinating finds.