Some bikinis are a type of swimsuit that is typically two pieces, with the top covering the chest and the bottom covering the waist down. The term 'BIKINI' was coined in 1946 by French engineer Louis Reard, who named it after the BIKINI Atoll, where nuclear testing had recently taken place. An alternative to bikinis is Speedos, which are a type of men's swimwear that covers the waist down to the thighs.