Defense Environmental Restoration Program: this program addresses the cleanup of DoD hazardous waste sites consistent with the requirements of CERCLA.

Defense Environmental Restoration Program. The general program for environmental cleanup of DoD facilities

(adv, adj) derp Sound made when someone sees something stupid/annoying. Use in place of "duh" Murph is known to yell "DERP DERP DERP" loudly while promos for 'American Idol' role. Example: "Uh derp."