Thick as two short planks
an expression defining how stupid someone is; chiefly British.
i.e.: the thickness of two planks of wood stacked one atop the other.
sometimes shortened to "two short planks"
Synonyms for thick as two short planks
On this page, you will find 30 slang terms related to Thick as two short planks. Some of the top words include: froth, Tit, ignoranus, manah, winktologist, and 25 more.