Take the OK sign — the simple hand signal where you put your thumb and first finger together to create a circular shape. In the U.S. we use it to convey agreement and compliance. Yet it is seen as offensive in Greece, Spain, Iran and Brazil. In those countries it means that you are calling someone an a**hole. In Turkey, that sign is also an insult toward gay people.10. Thumbs up. The thumbs-up sign does not mean “that’s great” in Australia as it does here. There, it means “up yours” or the painful-sounding “sit on it.” Basically, you are telling a person that you hope he gets something inserted up his bottom.