A derogitory term for the genitalia of a man possessing a vagina as well as or in place of a penis.
Though similar to the genitalia of a chick with a dick
it is distinguished as a predominantly male term.
Formed from the conjunction of Man and Vagina it was originally used as a vengeful mnemonic for the proper noun (Mrs) Mangion.
"Dude, I have a double period last two with Mrs. Manginer!"
"Hey Tim, wouldn't it be cool if I had a manginer on my arm!"