Her mother sounded as thick as two short planks, and she clearly didn't care much about the child anyway.

Then my father went down on his knees and smoothed the surface with the flat side of a short plank.

The door was rough wood, pieced together from short, narrow planks.

What a bunch of thick as two short planks turkeys.

Yet to my understanding she is as thick as 3 short planks, and knows virtually nothing about anything at all.

Thick as two short planks and wanted to be a doctor.

Thick as two short planks, all three of them.

All me life I've been called stoopid an' clumsy an' thick as two short planks.

They had shorter planks to lay across the long ones.

He appeared to be making a very short plank, and the speed with which he was working suggested that he'd done this before.