camo up verb2 •(informal) To put on clothing, make-up, etc. with a camouflage pattern, to wear camouflage.[…] No one told them anything about camo, and it takes them ten minutes to do it right.” ¶ “Well, we have five minutes and everyone has to camo-up,” the first sergeant explained patiently. — 2010 •(informal) To camouflage one's person or equipment, to hide or obscure from view.The plan is to have the veterinarian “camo up,” maybe by using a hunting blind, he said, to get close enough to take a shot with a tranquilizer gun. — 2009 formscamoed up · camoing up · camos up