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1.
1) Unteachable or untrainable

2) Cant see the obvious if it bit them on the arse

3) Someone who, by their very existence, are proof positive that information CANNOT be absorbed by osmossis. See THICK AS TWO SHORT PLANKS.

3) George W. Bush
George(W)Bush is as thick as pig shit.
by sociopath9 May 02, 2009

Words related to thick as pig shit

obtuse shit for brains stupid thick yank