Hedgehop is a verb that means to fly an aircraft at a low altitude over hedges or other obstacles. Some synonyms for this term include skimming, buzzing, or nap-of-the-earth flying. Skimming implies flying close to the surface, while buzzing can mean flying rapidly or aggressively. Nap-of-the-earth flying is a military term used to describe flying an aircraft at an extremely low altitude to avoid radar detection. Hedgehopping may also be referred to as terrain following or contour flying, which are also military terms that refer to flying low to avoid detection or enemy fire.