Gormless

Tom is a gutless, spineless, gormless, underachieving twat.

Did I ever look so stupid: so gormless as Joseph calls it?

But Mr. and Mrs. Wormwood were both so gormless and so wrapped up in their own silly little lives that they failed to notice anything unusual about their daughter.

There was a sort of gormless unstoppability about him that she found rather fascinating.

Hmm. Made an excuse, did he? Not as gormless as he looks in press photographs, then.

“Don’t just stand there looking gormless. There’s plenty of work to do in the back.”