hack ‧ neyed /ˈhæknid/ BrE AmE adjective
[ Date: 1700-1800 ; Origin: hackney 'to use (a horse) for ordinary riding, to use (something) too much' (16-19 centuries) , from hackney 'horse for ordinary riding' (14-20 centuries) , probably from Hackney , area in London, England where horses were once kept ]
a hackneyed phrase is boring and does not have much meaning because it has been used so often