The action of taking a shat on a mans penis weather it be accidental or on purpose
"she gave me a Messy Dior during anal last night."
"did you see him, he totally got a Messy Dior."
Messy Marv, a rapper who gained vast acclaim in the 90s, routinely included the word "messy" in his lyrics to affectionately describe individuals with a tendency to behave in an amusing manner that some may classify as unruly, dramatic, or controversial.
In the 70s and 80s, the word "slay" was redefined to describe and encourage people "killing it" with their moves and physical appearance on the dance floor.
The two were combined to create a term entitled "messy slaying" which translates to someone who is so attractive or successful in their endeavors that it sparks drama, incites mass controversy, or draws attention.
Girl, you messy slaying in that outfit, you not goin home alone tonight.
example:
1) Lionel Messi robbing ballon dors
2) Lionel Messi winning the world cup
3) Lionel Messi stealing ishowspeeds pp
When you throw spaghetti and bolognese sauce on a twister mat and with a significant other proceed to play a naked game of twister and proceed to make sweet love all night while covered in spaghetti and meat sauce.
Dude 1: Dude how was your date last night
Dude 2: It was awesome dude me and her played messy twister all night