a condition felt upon arising (from being horizontal to vertical) in which your headfeels like it is full of cement
caused by gastro-esphogial-reflux-disorder (GERD)-when the mist of refluxed stomach acids reach the sinus cavity thereby generating an excess of mucus to expel the foreign substance
Suzanne was tired of waking up every morning with cement head. She went to her doctor to learn why and he said that the condition is a result of GERD. He gave her a scrip for Nexium and the cement head went away.
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.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"