blue-on-blue

adjective

military of or relating to friendly fire blue-on-blue contacts

Word Origin for blue-on-blue

C20: from the colour used to mark a country's own troops and allies on a military map

Words nearby blue-on-blue

blue-green alga, blue-green algae, blue-headed vireo, blue-jeaned, blue-leg, blue-on-blue, blue-pencil, blue-red, blue-ribbon, blue-ribbon jury, blue-ringed octopus