A word said aloud when a a person places their arm across the shoulder of the opposite gender, or the same if you are that kind of person. The word must be enunciated and shouted at the top of one's lungs to notify others around you that you have placed your arm across her/his shoulder. The counterpart of this word is "KABOOM" when she/he responds by placing their arms around your abdominal region.
A: "I was at the theater last night and I 'SHABOOMED' my date."
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!"