overslaugh /ˈəʊ.vəɹˌslɔː/noun 2verb 1forms 3 noun2 •(no longer used) The permission to skip a duty; an exemption from an active duty.When an officer is on duty he receives an "overslaugh" for all other duties that come to his turn, provided that they are not additional duties that he may be called on to perform . — 1892 •(dialect, no longer used) A barrier in a river.The opening in dike No. 1 at the overslaugh was completed with the exception of deepening the cut, which could only be done at midsummer. — 1840 verb1 •(slang, no longer used) To hinder or stop, as by an overslaugh or impediment. formsoverslaughed · overslaughing · overslaughs