(noun)
An ostensibly modest declaration of the long duration, sumptuous quality, or unlikely circumstances of one’s sleep, immediately identifiable by the recipient as a thinly veiled boast.
(intransitive verb)
To attempt to lower one’s friends’ self-esteem by boasting about how well, how much, or how flexibly one sleeps.
1. “Wow, I just slept all the way from Bangkok to London in coach.”
“Thanks for that slumberbrag, Glenn, you pompous, rejuvenated jerk.”
2. “I was feeling pretty good about my life until Todd came in and slumberbragged all over me.”
A conspiracy in the Dallas Cowboys football organization in which WR Terrel Owens along with fellow WRs (names don't matter) believe that Tony Romo makes special plays with his favorite reciever, and friend, TE Jason Witten in hotel rooms during road trips.
The wide reciever core called a special meeting on December 11 with the offensive coordinator to iron out the issue.
A slumbering man or woman who pleasures themself while in the presence of another slumbering individual. Unkowingly to the slumberbater they may or may not try to interact with said slumbering individual.
I didn’t know you where a full on Slumberbater
Oh I must have been slumberbating again... do you need a mankin.