Green’s Dictionary of Slang

Dutch act n.

also Dutch route

[late 19C+] (Can./US Und.) suicide; thus do the Dutch act v., to commit suicide.

In phrases

do a/the Dutch act (v.)

[20C+] in fig. use, to run away, to flee.

take the Dutch route (v.) (also go the Dutch route)

[20C+] (US prison) to commit suicide.