overlash /əʊvə(ɹ)ˈlæʃ/ verb3 •To physically tie additional wires or cables to those that are already attached to a utility pole, accommodating any additional strands of fiber or coaxial cable on existing pole attachments •(no longer used) To carry to excess.to overlash in phrases •(no longer used) To exaggerate.it being well known , that they in their encomiastic speeches , as orators are wont , following the heat and gaiety of fancy , do sometimes overlash — 1678 formsoverlashed · overlashing · overlashes