The short definition of a "wild deed" is an improperly recorded deed. The most frequent occurrence of a wild deed is when the grantor of the deed does not have prior recorded interest in the property. "Wild Deeds" were prevalent during the early 1900's when people often laid claim to land that was not legally theirs and then attempted to sell the property. This "wild deed" being worth no more than the paper it was written on.

Example

This well known case is in Imperial Country documents as a transfer of deed on over 760,000 acres of land that was, and still is, owned by the Federal Government.

Article can be found here