Plab Smackin Share definition Flag When someone/something smack their lips in a sexual/gross way. Referring to the word "Plab" "yo why the fuck my dog plab smacking his lips so hard" Plab Smackin by Zalgo Nezperidian the 2nd October 19, 2019 0 0 Get merch Get the Plab Smackin mug. Buy Now — $32.95 See more merch