Hey, watch this! 

Dumbass for "I am about to do something incredibly stupid."
When you hear these words, the last thing you want to do is listen to them.

Dumbass 1; "Hey, watch this!" *takes out gasoline can*
Sensible Person; *Runs the fuck away.*
Dumbass 2; *Stays where he is, intrigued.*

Hey, watch this! by Tyler the Narwhal April 10, 2013

hey watch this

Hey watch this---The last thing sombody yells out before they fuck up bad.

"Hey watch this", Frank yelled before he dove 30 feet head first into 3 inches of water.

hey watch this by vernon dutton January 21, 2004

hey yall watch this 

A phrase that hillbillies/inbreeds/rednecks yell before they run off and do something really stupid like sleding on a gatorade machine, shooting themselves in the ass with a shotgun,boning their cousin and/or brother(oh sweet jesus), and riding a mechanical animal. This most often results in the death of the hillbilly or an innocent black man.

If you here hey yall watch this call 911

hey yall watch this by snowman33 January 4, 2006

hey yall watch this 

a rednecks last words

redneck: HEY YALL WATCH THIS

onlooker: hmmm. the gene pool just got cleaner. better call 411 and get the number for 911!

hey yall watch this by yer father/uncle/brother January 10, 2006

hey guys, watch this!

The last words of some rednecks.

Hey guys, watch this!
Dammit Bill, are you really at it again?!
*explosion*

hey guys, watch this! by Racist Asian May 7, 2018