Definition

A Welsh term meaning exceptionally stupid or dim-witted, particularly used in the South Wales valleys. It's the Celtic way of calling someone thick as a brick without resorting to English profanity. When regular "stupid" just doesn't capture the full extent of someone's dullness, you go with "twp."

Example Usage

He tried to unlock his car with his house key for five minutes—absolutely twp.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=twp&defid=20698)

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