Jill didn't get the joke, but she laughed along to save face & hoped that no one would ask her to explain the punch line.
(Noun) A person’s foodstuff-coated mug.
Or, “After George went down on me he didn’t wipe his mouth off. Then he went in for a kiss –dude totally tried to Save Face me! Needless to say, George and I are over.”
Example (Noun): “Dude, bro – obviously that girl really liked her chocolate ice cream, look at her Save Face.”