A mild slang name for a penis, supposedly less offensive that
cock,
prick, or dick, it does not have the fecal connotations of dingleberry but is used to describe the penis in much the same circumstances by much the same people. In addition it can also be used as a mildly disparaging term for a person who has exasperated you by doing something atypically
stupid.
"I had to
rush like hell to get here on time. I was halfway here when I remembered I'd left the contract in my
desk at home and had to go back for them, I felt like a
right dooberry."