late 14c., intransitive, "indulge or feed to excess," from surfeit, n.. Related: Surfeited; surfeiting. Transitive sense from 1590s.

early 14c., "excess quantity;" late 14c., "overindulgence," from Old French sorfet "excess; arrogance" (Modern French surfait), noun use of past participle of surfaire "overdo," from sur- "over" (see sur-(1)) + faire "do," from Latin facere "to make" (see factitious).