Deadbirding is when you
fall (
usually while rockclimbing) and get cornholed by a tree or similar
structure.
Tom - Dude, be careful, if you come off of that overhang you're going to
pendulum and deadbird right on to that tree.
Jeremy - Yeah, got it...
umm...
oops...Fallling!
*swings*
*deadbirds*
Tom - Ooohhh. Yeah, just like that....