If Croomed means a coach getting fired after losing to MSU, then yes.
If Croomed means a coach getting fired partially because of a loss to Croom, then yes.
If Croomed means a coach getting fired immediately after losing to Croom, then no, because 2007 was Orgeron's second loss to Croom. Going into 2007, he was one of only a handful of D-1A coaches who was still coaching at the school where he lost to Croom.
My vote would go to saying, yes, he goes on the list of coaches being Croomed. However, that vote may get some opposition depending on how Croomed is defined.