Wiktionary
vb. (context transitive informal English) To lose (weight) by sweating (from heavy exercise, sauna etc.).
WordNet
v. lose weight by sweating; "I sweated off 3 pounds in the sauna"
Usage examples of "sweat off".
He wiped the sweat off his forehead and took deep breaths of the warm, dry air.
Parry wiped beads of sweat off the bridge of his nose with his fingers.
He could tone up and sweat off some weight while keeping an eye on things.
Mother Obligatia lay with a hand across her eyes, pale and breathing shallowly, while Sister Diocletia wiped sweat off the abbess' face with her own robes.
They wiped the sweat off, crouched down in the shade, let their tongues hang out and sniffed like dogs.
She rubbed the sweat off her forehead and wondered what in hell was wrong.
It had begun to rain again, fat drops like the sweat off Buddha's brow.
The sun was very strong, but a cboling wind wicked the sweat off them, and in the shade there was a distinct chill, pockets of air, denser than the rest, left over from the night.