Zubar da fadama magana ce wacce 'yan siyasa ke yawan amfani da ita tun shekarun 1980. Maganar na iya yin ishara da magudanar ruwa ta zahiri da ake gudanarwa domin rage yawan sauro domin yakar cutar zazzabin cizon sauro, da ta yadu a Wani lokaci a Washington DC a kan filayen fadama. An yi amfani da shi azaman misali ta: Helen Hunt Jackson (1830-1885) wanda ya rubuta cewa don "share fadama" (matakin farko na bayyananne don dawo da "jeji mai guba da fadama") ya kasance ma'anar da ta dace don yadda za a fara magance "abin kunya a gare mu na halin yanzu. Indiyawan mu." Winfield R. Gaylord (1870-1943) don bayyana sha'awar gurguzu don "zubar da" "'yan jari-hujja". Victor L. Berger (1860-1929), wanda a cikin littafinsa Broadsides ya yi nuni da sauya tsarin jari hujja a matsayin "magudanar ruwa".