stupidcide

Doing something so stupid that it gets you killed.

He jumped in the tiger cage in an act of stupidcide.
Flipping the finger at the head of a drug cartel = stupidcide

stupidcidal

someone who unintentionally kills themselves or puts themselves in danger by doing something dumb.

"I saw a stupidcidal today"
"oh yeah? what happened?"
"this guy ran across the highway. he got hit halfway through!"
"yikes, definitely a stupidcidal"