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

• malheur wire lettuce
• Mali
• Mali franc
• Malian
• malic acid
• malice
• malice aforethought
• malicious
• malicious gossip
• malicious mischief
• maliciously
• maliciousness
• malign
• malignance
• malignancy
• malignant
• malignant anaemia
• malignant anemia
• malignant hepatoma
• malignant hypertension
• malignant hyperthermia
• malignant melanoma
• malignant neoplasm
• malignant neoplastic disease
• malignant neuroma