A word conservatives misuse because they are, ideologically, libshits.
A derogatory term used by marxists towards liberals, and by conservatives towards anyone they don't like. Most often when they make an incorrect claim regarding economics, politics, history, or many of the other things they don't understand.
A:"Poor people are just lazy, all they need to do is participate in capitalism and work hard and they'll be rich."
B:"Shut up, libshit."
A door wall is a sliding-glass door or patio door. The term is yet another example of banal Michigan vernacular, where in the residents latch on to company names, trademark names, marketing terms and product names from local companies. The terms become embedded in the local vocabulary and eventually become accepted as actual valid words and phrases. In this case the term comes from Wallside Windows in Taylor, MI (a large window manufacturer), where 'door wall' is their created word for sliding-glass door.
"Bob! John's gonna bring over them doorwalls from Wallsides on Tuesdee afternoon 'round two-thirty. Get 'er done!"