Definition of hand jam in English:

hand jam

noun

  • An act of wedging an open hand in a crack as a handhold.

verb

  • 1no object To climb by using a hand jam or hand jams. With up, over, etc.

  • 2with object To wedge an open hand in (a crack) as a handhold.

Origin

1940s. From hand + jam. Compare earlier hand-jamming<br>1960s; earliest use found in Punch. From hand + jam, after hand jam.

Pronunciation

hand jam

/ˈhan(d) dʒam/