1. On a railway flatcar
   - piggyback, pig-a-back 
2. On the back or shoulder or astraddle on the hip
   - piggyback, pig-a-back

Encyclopedia: Pickaback

• koto player
• Kotoko
• kotow
• koudou
• koumiss
• kouprey
• Koussevitzky
• Kovna
• Kovno
• Koweit
• kowhai
• kowtow
• KP
• kph
• Kr
• kra
• kraal
• Krafft-Ebing
• kraft
• kraft paper
• krait
• Krakatao
• Krakatau
• Krakatoa
• Krakau