pickaback r on a railroad flatcar r on the back or shoulder or astraddle on the hip Usage(s) Where upon the pickaback hitchhiker turned into an evil jinni, clamped naked, hairy thighs around the young man's neck forever after. Most-discussed method: Heinkel pickaback planes had carried the bombs close to England before releasing them. Standard will soon show off new pickaback flatcars, the first especially designed for hauling truck trailers. Synonym(s) piggyback pig-a-back