Backyard-ish

an action or oral rendition that should not be seen or heard by others-something that should only take place in your own backyard.....or maybe NOT,
a dumbass move,redneck,a stupid move,should be an embarassing moment

Mom: I cant believe you did that,thats so backyard-ish!
Or...
Mom: Oh,thats backyard-ish!

You dumbass, that soooo backyard-ish