Prat
WordNet
noun
(1) The fleshy part of the human body that you sit on
"He deserves a good kick in the butt"
"Are you going to sit on your fanny and do nothing?"
WiktionaryText
Etymology
Recorded since 1597, of Germanic, disputed origin, perhaps from prætt 'a trick, a prank'
Noun
Etymology
Germanic, cognate with praten 'to talk', pret 'fun' and English, of uncertain origin