·noun ·Alt. of Untrusser.
II. Untruss ·vt To loose from a truss, or as from a truss; to untie or unfasten; to let out; to Undress.
To untruss a point; to let down one's breeches in order to ease one's self. Breeches were formerly t...
Dictionary of The Vulgar Tongue by Francis Grose