The phrase "popular parlance" means the way people commonly talk or express themselves, using words and phrases that are widely understood or familiar to a lot of people. Full definition
Thus, the great console gender shift happened: I moved on to playing on une Playstation (and 2, and 3, and so on), la Dreamcast, une Xbox... but for some reason the Nintendo consoles lagged behind in popular parlance. (waypoint.vice.com)
These are, to use popular parlance in universities these days: «trigger words.» (rismedia.com)
She was 43 then, but she must have been known as what's common in popular parlance: as this hot Japanese chick. (portlandart.net)