Another word for suicide, but it is a suicide completed by taking a concoction of pills, the word comes from the sound of the bottle before the pills are taken.
I'm just going to rattlesnake and leave this world.
(1) ' n. Any of various poisonous American snakes, of genera Crotalus and Sistrurus, having a rattle at the end of its tail. ' -- Wiktionary
(2) According to Kurt Vonnegut, the rattlesnake is a creature so inimical to humankind that it makes you wonder about the vaunted benevolence of the Creator of the Universe.
EXAMPLE:
' Dwayne mimicked her cruelly in a falsetto voice . . . He looked about as pleasant and relaxed as a coiled rattlesnake now. It was his bad chemicals, of course, which were compelling him to look like that . . .
' The Creator of the Universe had put a rattle on its {the rattlesnake's} tail. The Creator had also given it front teeth which were hypodermic syringes filled with deadlypoison.
' Sometimes I wonder about the Creator of the Universe. '
-- From Kurt Vonnegut's 1973 novel "Breakfast of Champions" -- Chapter 15 (page 159 - 160).
An aggressive manoeuver used to ward off potential threats against oneself.
When one correctly performs a rattlesnake, they will have succeeded in poking the assailant's eyes (please refer to The Three Stooges for more information) and also biting them in the scrotum (if they happen to be male).
There is room for variation and interpretation, but preferably, one will not actually have to go through with the threat; the assailant will be confused with your random combination of threats, or scared for their lives.
Fred: "Hey, Tom! Give me my hat back before I rattlesnake you!"
Tom: "What's a rattlesnake...?"
Fred: "It's where I poke you in the eyes and bite your scrotum!"
Tom: "Woah! Weird! Take your hat back and never talk to me again!"