Feed One's Face Meaning

Example : 1909, Upton Sinclair, Samuel the Seeker, ch. 4:  "Step up and feed your face."  "What?" stammered Samuel, perplexed.  "EAT!" said the other.1910, Stewart Edward White, The Rules of the Game, ch. 13:  "Feed your face, and we'll go upstream." Bob ate rapidly.1997 Aug. 31, George Vecsey, "Sports: Fill Ashe Stadium With Some Real Fans," New York Times (retrieved 13 Oct 2013):  While the players are out there whacking away at tennis balls, the lower-deck patrons are feeding their faces on $5 shrimps and sipping $10 glasses of wine.2010, Katie Flynn, The Cuckoo Child, ISBN 9781446411193, p. 292 (Google preview):  â€œThough why I should give the boys bacon and eggs when they've already fed their faces wi' fish 'n' chips, I can't imagine.”