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

• naked as the day one was born
• naked as the day you were born
• naked eye
• naked lady
• naked mole rat
• naked option
• naked-muzzled
• naked-tailed
• nakedly
• nakedness
• nakedwood
• naker
• Nakuru
• Nalchik
• Nalfon
• nalidixic acid
• Nalline
• nalorphine
• naloxone
• naltrexone
• Nam
• namable
• namaskar
• namaste
• namby-pamby