It might be a geographical colloquiallism like pop or soda, but I think it is more like using the word Kleenex exchangeably with tissue. It is like using the brand name for an item, but going one step further.

I have lived only in the west, and they have all used the term sp "Deed" for falling over cause of your clips.

California, New mexico, colorado, utah all used this terminology. Don't know about the east coast but you would have to ask someone who has been riding a fair period of time to see.

spoke