Lather

1. Foam from profuse sweating, as of a horse.
2. Foam or froth made by soap moistened with water.
3. To beat severely with a thong, strap, or the like; to flog.
4. To spread over with lather; as, to lather the face.
5. To form lather, or a froth like lather; to accumulate foam from profuse sweating, as a horse.