1. Of two or more people or animals, to huddle or crowd very close to one another. In this usage, a reflexive pronoun can be used between "squeeze" and "up." My car's pretty small, so you'll all have to squeeze up in the back seat. The family of rabbits squeezed themselves up in the small burrow to avoid the predator.

2. To press two or more people or things firmly or compactly together. In this usage, a noun or pronoun can be used between "squeeze" and "up." They just squeezed 30 of us up in the small room and told us to await further instructions. I squeezed up the two lumps of clay so I could make a larger sculpture.

3. To crush, crumple, or mash something into a deformed or broken mass. In this usage, a noun or pronoun can be used between "squeeze" and "up." He squeezed up the newspaper into a ball and threw it aside in disgust. Hey, let go of my diorama—you're squeezing it up!