Mope about
Definition 1 of 1
Pro Tip 1/3Negative Connotation
The phrase often implies a judgment and may sound critical if used to describe someone's behavior. 
Don't just mope about because you didn't win—let's find a solution!
Pro Tip 2/3Action Association
'Mope about' usually involves aimless physical or mental activity without purpose. 
He spent the afternoon moping about, unable to focus on his work.
Pro Tip 3/3Informal Usage
This phrase is casual and typically used in informal conversations, not in formal writing. 
I've been moping about all day, just not feeling up for anything.