Someone who creates a hole in the wall structure by applying a large force through their forehead and thereon the wall.
Wallhead what's the time?
Grant Reekie is the wallhead.
Sodium Infrastructure wallhead to the power five.
"What happened to that wall Billy?" said mother
"Oh I'm not sure..." he replied furtively
"Did you do it you fucking wallhead! Die wallhead die! I hope you rot in hell! You son of a wall! Aaaaaahhhhhhhhh" She said calmly.
"Hey wallhead what you up to today?""Oh nothing, just putting my head through walls..."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.