A trap, pony trap (sometimes pony and trap) or horse trap is a light, often sporty, two-wheeled or sometimes four-wheeled horse- or pony-drawn carriage, usually accommodating two to four persons in various seating arrangements, such as face-to-face or back-to-back.[1][2][3][4] In the eighteenth century, the first carriage to be called a trap was a gig with a hinged trap door, under which was a place to carry a dog.[5][6] In late nineteenth century USA, four-wheeled dog carts with convertible seats also started to become known as traps.[7]
"Pony and trap" is also used as Cockney rhyming slang for "crap" meaning nonsense or rubbish, or defecation.[8]