FLAUNCHING Meaning of FLAUNCHING in English [ 'flɔ:ntʃɪŋ ]■ noun the sloping fillet of mortar embedding the base of a chimney pot.OriginC18 (as flaunch , denoting a flange): perh. based on OFr. flanchir 'to bend'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004