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1.
vagina
"Any doctor that claims he or she can assist you in your mythical creature quest via nip/tuck to the mudgeon is steering you wrong."

-Vesta Vayne
by OneDayI'llBeThatGuy May 29, 2012
 
2.
A young Curmudgeon.

One who is ill-tempered, miser-ish, grouchy and complains, but is too young to be a conventional "curmudgeon."
"He's such a curmudgeon"
"But he's only twenty..."
"I guess he's just a mudgeon then."
by Magillichetti January 02, 2012