mandoticon
When someone enters an emoticon into a text conversation and you feel obligated to respond with one, lest you are an unsympathetic jerk.
Girl: I had pasta salad for lunch :)
Guy: (that's weird, I don't know what to say, but it definitely requires a mandoticon) Ok......:)
Guy: (that's weird, I don't know what to say, but it definitely requires a mandoticon) Ok......:)