Smotheration 

A combination of smothering and suffication, typically with pillows. See also: Smotherate -ed, -ing.

Well officer, it seems the victim succumbed to violent smotheration.

Smotheration by Curtis Meyer October 23, 2009

boob smotheration 

V. When you don't have a bra on, roll over in the middle if the night and possibly smother.

Last night while sleeping, I had a boob smotheration.

boob smotheration by Garynjess January 22, 2017

smothercating 

When you want to describe smothering and suffocating in one word/when something is smothering and suffocating you at the same time.

Man, that tie was so tight that it was smothercating me.

smothercating by Koolkitty July 19, 2017