Terrapin may mean:

• Certain reptiles of the order Testudines, with the exact definition varying, see turtle
  • specifically the diamondback terrapin
• The mascot of the sports teams at the University of Maryland, College Park, specifically the diamondback terrapin. The slang word for Terrapin adopted by the students of the University of Maryland is "Terp". The official mascott of the University of Maryland is Testudo the terrapin turtle.
• Terrapin (amphibious vehicle), a transport vehicle used for amphibious assault by the Allies during the Second World War
• The first song on the Syd Barrett album, The Madcap Laughs
• Terrapin are what Koopa Troopas are called in the Super Nintendo game Super Mario RPG
• A class of medium freighter in the PC/Mac game Escape Velocity Nova
• Terrapin Inc., a computer software company, specializing in educational software and hardware for children utilizing the Logo programming language (which was designed for educational purposes)
• Terrapin Beer Company - a microbrewery based in Athens, Georgia.
• Terrapin Station, a 1977 album of Grateful Dead
• HMS Terrapin - a British ship.

• (Terrapin Sandwich), 1937 -a hot sandwich composed of chicken, chicken broth, boiled eggs, soda crackers and seasonings all ground together and served on a bun. It was created by the Bloomer West Side Market in Lyons, IN USA as an inexpensive way to serve people a good meal at a church function.