"as mark and his closest friends rounded off the evening laughingly, hardly anyone was the wiser as mark suavely opened up the check folder and experienced momentary billface
the involuntary facial reaction produced by payer of bill upon observation of bill at time of payment at a restaurant or bar
""as mark and his closest friends rounded off the evening laughingly, hardly anyone was the wiser as mark suavely opened up the check folder and experienced momentary billface" What is the definition of "billface"?