Lappen

Etymology 1
From, from , from of  origin, possibly.

The form is remarkable because of the unshifted geminate -pp- (instead of expected Old High German *lapfo). Based on the supposedly invariable nature of the consonant shift, would have to be an originally Central and Low German form (compare 🇨🇬). This is, however, quite unlikely since the Old High German word is attested as early as the 9th century, and no variants with -pf- exist. The form remains thus unexplained.

Noun

 * 1) cloth, rag
 * 2)  lobe
 * 3)  driving licence
 * 4)  loser; idiot