water buffalo
n.— «Larson said his “water buffaloes,” a term used to describe experts in the water field, took advantage of the lull to sway his thinking, too. They didn’t like the idea of bringing water quality into the mix.» —“Water quality bill passes House” by Danie Harrelson Daily Sentinel (Grand Junction, Colorado) May 3, 2006. (source: Double-Tongued Dictionary)