yapp

yapp · noun¹

Said to be from Yapp, the surname of the 19th-century bookbinder who invented them.

Yapp · proper noun²

1. Old English · derived fromgēap“crooked, bent; devious, cunning”
2. Middle English · derived fromyap“deceitful, shrewd”
3. English todayYapp

Nickname for a clever or cunning person, from Middle English yap (“deceitful, shrewd”), from Old English gēap (“crooked, bent; devious, cunning”).