lumpish

Stupid or dull.

Clumsy or cumbersome.

Like a lump; unformed; gross; dense.

Clumsy; dull; stolid; stupid.

Like a lump; inert; gross; heavy; dull; spiritless.

Like a lump, cloddish, dull, slow-witted.

Like lumps, composed of unshaped or mismatched pieces.

Shaped like a lump, ill defined in shape.

mentally sluggish