Giant Death-ray In The Backyard Edit Meaning

1.

1)Boredom.

2)to have a GDRITBY: to be bored,

3)to build a GDRITBY, to kill time,

4)to be a GDRITBY, to be an amusing waste of time, an easy ride, or a complete wank.

(it is considered a faux-pass to specify possesion of the backyard in question)

Of Washington D.C./VA/MD (USA) regional origin, generaly thought to have been inspired by an episode of Myth-Busters, and; or the ramblings of a random meth-head who works in a drivethru.

"What are you doing Friday?"

"Not much, just building a giant death-ray in the backyard."

"Indeed."

See backyard, bored, wank