From English - German Ding/FreeDict dictionary ver. 1.9-fd1: prolly /pɹˈəʊli/ [coll.] wahrscheinlich <adv> Synonym: probably see: Probably he knows, but he doesn't want to tell us.
prolly /pɹˈəʊli/ [coll.] wahrscheinlich <adv> Synonym: probably
see: Probably he knows, but he doesn't want to tell us.