1
general::
Phrase(s): string someone up
to hang someone. • The sheriff swore he would string Tex up whenever he caught him. • He never strung up Tex.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Hang; also, kill by hanging. For example, They strung up their Christmas lights in October, or The mob wanted to string him up on the nearest tree. [Early 1800s]
American Heritage Idioms