My friends use the upside-down face to mean "reacting to something silly" (the tongue-sticking-out emoji means "I did/said something silly") But this is both t

My friends use the upside-down face to mean "reacting to something silly" (the tongue-sticking-out emoji means "I did/said something silly") But this is both the strength and weakness of emojis: they don't really have universal meanings.