speedo

noun

1. (informal)A speedometer, particularly one in a race car or other automobile.

   “You don′t need to change dashboards since the switches and instruments are suited to the V8, although the speedo and tachometer will require modification to adjust them to your V8′s gearing and cylinders.”

   “One further advantage of the ‘J’ type overdrive units is that the speedo drive gear on the rear drive shaft of the gearbox can be changed, thereby adjusting the speedo-drive ratio to suit the TR′s 15in wheels.”

   “The main instruments are in the centre of the dash, finished in silver (grey on the GP); consisting of a circular speedo with petrol and temperature gauges on either side.”

2. (alt-of)Alternative letter-case form of Speedo.
3. (US)A tight-fitting swimsuit, especially commonly worn by competitive swimmers and divers. Usually implies a brief or bikini style swimsuit.

   “I could tell that she was a serious swimmer, because every time I saw her at the pool she was wearing a Speedo of one design or another.”

   “She's wearing Mom's teeny-weenie black Speedo bikini, the one Mom wears to show how fit and trim she is.”

   “These muscle-bound hard bodies are wearing Speedo Lycra bikinis which stick to a man's body like a woman's wet T-shirt.”

   “There were dozens of girls in there - girls on the deck in bathing suits, most of them Speedos because they were racing.”

   “Ryan and I remain unmoved, standing at the edge of the water as five Speedo-clad lifeguards rush up to us.”

4. (US)(by restriction) A male swimsuit, very tight fitting and small, brief-style, and not a thong-type.

   “She called down from upstairs, "He'll be out in a minute: he's just putting his Speedo on."”