Sponge, v. i. 1. To suck in, or imbibe, as a sponge.
2. Fig.: To gain by mean arts, by intrusion, or hanging on; as, an idler sponges on his neighbor. E. Eggleston.
The fly is an intruder, and a common smell-feast, that sponges upon other people's trenchers. L'Estrange.
3. To be converted, as dough, into a light, spongy mass by the agency of yeast, or leaven.