smackless adjective3 •Lacking smack (all senses)At one period I received sufficient 'smackings' to grow callous, almost careless, about them. After a smackless ten days that far grimmer bogey, Fear, reasserted itself. — 1961 •(slang) Without heroin.So Suzy and I compared our faultless arms, and exulted in our survival, in our own not wanting to die, in our own smackless pleasure in being just alive. — 1996 •(informal) Without kisses.Oh, Who Could Be So Heartless As To Vote Dry And Leave This Poor Child Bankrupt and His Mamma Smackless? — 1914 formsmore smackless · most smackless