prat /pɹat/noun 4adjective 1forms 3phrases 2 noun4 •(UK, slang) A fool, contemptible person.Those protestors will have achieved nothing good. They are stupid prats. — 2023 •(slang) A buttock, or the buttocks; a person's bottom.Pratt, a Buttock. — 1608 •(slang) The female genitals."She's a far better piece Than the Viceroy's niece, Who has also more fur on her prat." — 1967 •(Scotland) A cunning or mischievous trick; a prank, a joke. adjective1 •(no longer used) Cunning, astute. formsprats · more prat · most prat Phrases with prat prat aboutTo waste time doing pointless or silly things prat aroundTo behave foolishly.