As adjectives the difference between jumpy and jerky
is that jumpy is nervous and excited while jerky is characterized by physical jerking.
As a noun jerky is
lean meat cured and preserved by cutting into thin strips and air-drying in the sun.
jumpy
English
Adjective
(er)
Nervous and excited.
jerky
English
Etymology 1
Adjective
(er)
Characterized by physical jerking.
Etymology 2
From (etyl) , through Spanish charqui.
Noun
Lean meat cured and preserved by cutting into thin strips and air-drying in the sun.
Derived terms
* jerk
* jerked beef
* jerked meat