thick ‧ o /ˈθɪkəʊ $ -koʊ/ BrE AmE noun ( plural thickos ) [countable]
[ Word Family: noun : ↑ thick , ↑ thickness , ↑ thickener , thickening, ↑ thicko ; verb : ↑ thicken ; adverb : ↑ thickly ; adjective : ↑ thick ]
British English spoken someone who is very stupid