1. To move slightly to the side, especially while seated. Hey, scooch over so I can fit another chair at the table. Would you mind scooching over? I'd like to sit here too.
2. To move or cause to move someone or something that is on the ground slightly to the side. In this usage, a noun or pronoun can be used between "scooch" and "over." Help me scooch this table over so everyone will be able to fit in the kitchen. Just scooch the kids over a little bit so that you have room to sit down here.