Wiktionary
string up
vb. 1 (context transitive idiomatic English) To kill (a person) by hanging, especially to lynch. 2 (context intransitive idiomatic obsolete English) To die by hanging. 3 (context transitive idiomatic English) To suspend by means of rope, cord or similar material. 4 (context transitive idiomatic English) To concatenate; to link in a line.