riggot
/ˈrɪɡət/English regional (chiefly northern and north midl. )
noun
A channel or drain made in the surface of the ground; a gutter, a rain-spout. Now rare.
Origin
Mid 17th century (in an earlier sense). Origin uncertain; perhaps originally a variant of riggle or rigol, with alteration of the ending after formations in -ot, -et, and -ate.