depontisate 

To throw off a bridge, as in a person. (verb)

The etymology of defenestrate is such that the root, fenestra, comes from the latin word fenestra, which means "window". Defenestrate, therefore, pretty much means de-window-ate. If you dewindowate someone, what are you doing to them?
The latin word for bridge is pontis. To debridgeate someone, you need only depontisate them.

If you were to jump off a bridge and depontisate yourself, you would be committing suicide via death by autodepontization.

depontisate by ButterWang July 5, 2007

depontication

to throw someone off a bridge

Jamie was upset with the way the argument with Jill was going and as they crossed a bridge he saw an opportunity to end his misery. At the perfect moment he chose to practice a bit of depontication.

depontication by just a guy living in BKK October 20, 2013

Depontisation 

the action of physically forcing someone or something off of the side of a bridge.

Country Mac commits self depontisation in 'Always Sunny in Philadelphia,' Season 9, Episode 5 "Mac Day" (famous for the suicide is badass meme of Danny DeVito).

Bungie Jumping is often depontisating for fun.

In the movie Joe Dirt, Joe Dirt is accidentally depontisated at the end of the movie's climax.

Depontisation by Hus#0408 May 21, 2023