The word cuddie/cuddy originated from Scottland A last name to many ..Later became a slang word cutthroat or cuddy buddy. Used in rap music mostly said and used by African Americans.
Now let me introduce Alicia cuddie to the stand.

That's my cuddy buddy ..eye to eye.. hand in hand .. blood to soul .. my Patna!
by Solo7 May 20, 2018
As used in the popular movie, ATL, meaning sex or intercourse.
"Aye homie, you got some cuddie last night?"

"WHAT!? The only person in this house getting cuddie is me. I gets the booty. I gets the breasts. I gets it all."
by funforallbarbiedoll October 12, 2017