Do up Definition 1 of 3Pro Tip 1/3Safety Related Often used to remind someone to secure their clothing, like a belt or helmet, for safety. Before cycling, always do up your helmet. Pro Tip 2/3Gesture Required Involves a physical action like pulling a zipper or tying laces. Could you help me do up my dress? Pro Tip 3/3Assistance Request Can express requesting help when one can’t do something on their own. My hands are full, can you do up my coat?