From Wiktionary, the free dictionary
From gargle + -er.
gargler (plural garglers)
- One who gargles.
2009 July 7, Nicholas Bakalar, “Regimens: Licorice May Curb a Postoperative Hurt”, in New York Times[1]:By the end of 24 hours, nine water garglers, but only two in the licorice group, still found it painful to swallow.