mope around
mope about

Even Gwen has been moping about in her room.

"We bicker amongst ourselves, we mope about, watching the ash fall, convinced that we're doomed."

"Then why are you always moping about?"

Of his endless moping about and waiting for humanity to climb into space-going vessels and come out and find us again.

Such positive thinking beats moping about.

Moping about, mostly, feeling sorry for myself.

"I only popped up to tell you that while you've been moping about, we've been working."

"This isn't something to mope about," Moss said.

There will be no more moping about and no crafty little ploys.

Since no immediate solution to his problems appeared forthcoming, Tas decided not to waste his time in this interesting place moping about.