When in conversation, person A says
something that person B knows is
sarcastic but cannot detect the sarcasm in person A's voice. Derives from when a grasshopper is in the
grass and you know it is there but you cannot see it.
After Steve has had a mild
day of work/
school mainly consisting of fooling around.
Steve: "Today was really tiring, I had loads to do"
Alan: "Really? Or is that just grasshopper sarcasm?"