When you take your testicles out of your waistband so your scrotum stretches out to the max and looks like a brain. Often showed to others under a table as a surprise prank.
Basically, braindead means someone so stupid, that they don't think about anything and does everything stupid and talks extremely stupid things that don't make even a bit sense.
Baby, I love you so much, that 60 minutes feels like 1 hour!
Oh, really? I love you so much!!
such a lmao moment, these two are too braindead and have 2 braincells