Flip-flops, zoris, Hawaii chappal, thongs, Japanese sandals, or jandals are an open type of outdoor footwear, consisting of a flat sole held loosely on the foot by a Y-shaped strap, like a thin thong, that passes between the first (big) and second toes and around either side of the foot. Flip-flops may also be held to the foot with a single strap over the front of the foot rather than a thong.

Flip-flops are a common type of footwear. They are a thin rubber sole with two straps running in a Y shape from the sides of the foot to the gap between the big toe and its neighbour. The popular use of flip-flops as beach or outdoor wear has spread through much of the world, although it is most common in India and Pakistan (where it is immensely popular and is called a Hawaii chappal), Australia, New Zealand, South Africa, UK, USA, Brazil, Panama, Israel, the Pacific Islands, and Southeast Asia.

However, they are not considered flip flops if they have a strap around the heel or ankle, they have more than a 1/2 inch heel, or they are sparkly. In any of these cases the shoe would be considered more along the lines of a business casual sandal.