A medical procedure by which a
Gentleman who wishes to transition into a Lady, has their genitalia lopped off,
whilst creating a bit of a tuck in
front of their bunghole, to resemble a vagina.
The reverse of this might be called a Strapadictomy, whereby a Lady alters their genitalia to resemble a penis.
"Here, have you heard about
Arthur?"
"No?"
"He's now a Martha, 'he's' has a cockoffscopy!"
"
Blimey that's gotta
itch."