Shoot off Definition 1 of 4Pro Tip 1/3Quick Departure Implies leaving with urgency, often without a farewell. Heard my phone ring and had to shoot off. Pro Tip 2/3Informal Setting Commonly used among friends or in casual conversation. Let's catch up when you're back, got to shoot off now! Pro Tip 3/3No Explanation Doesn't require explaining why one is leaving abruptly. Oops, is that the time? I must shoot off!