Dibs/dɪbz/ Definition 1 of 1Pro Tip 1/3Informal Situations Use 'dibs' in casual settings with friends or family, not in formal or professional environments. I've got dibs on the front seat for our road trip! Pro Tip 2/3Claiming Items 'Dibs' is often used to claim physical items like seats, pieces of food, or turns in a game. I call dibs on the window seat on the plane! Pro Tip 3/3First Come, First Served Saying 'dibs' implies a first-come, first-served basis and is not an official reservation. He called dibs on the last donut, so it's his now.