Origin of pratfrom uncertain or unknown; perhaps
- Slang The buttocks.
- Chiefly British Slang A person who is incompetent and stupid.
Origin of pratOrigin unknown
From Middle English prat, from Old English prÃ¦t, prÃ¦tt (“trick, prank, craft, art, wile"), from Proto-Germanic *prattuz (“boastful talk, deceit"), from Proto-Indo-European *brodno- (“to wander about"). Cognate with Eastern Frisian prat, Dutch pret (“fun, pleasure, gaity"), obsolete Dutch prat (“cunning, strategem, scheme, a prideful display, arrogance"), Low German prot, Norwegian prette (“trick"), Icelandic prettur (“a trick"). Related to pretty.