10 definitions of PDA. Definition of PDA in Slang/Internet Slang. What does PDA stand for? Kourtney Kardashian isn’t letting her ex Scott Disick‘s recent PDA with Bella Thorne stop her from enjoying her vacation — she’s got her own budding romance to focus on. On Wednesday, Kardashian was spotted leaving the Gotha nightclub in Cannes hand-in-hand with her beau Younes Bendjima, a. You may still be in the early days…