Loopy/ˈluːpi/ Definition 1 of 2Pro Tip 1/3Informal Use Used in casual settings among friends or in humor, not in serious or formal situations. You're acting loopy – did you skip sleep again? Pro Tip 2/3Mild Insult Can be a playful insult. Be careful as it might offend if the context isn't clear. Stop being so loopy and focus! Pro Tip 3/3Temporary State Implies a temporary state of confusion or silliness, often due to a specific cause. Medication sometimes makes me feel a bit loopy.