Pinka is ike a fill-in-the- blank word. Often used by people who don't/aren't allowed to curse in front of others, so they say pinka!
Miss Smiley: Holy Mother!
Miss Smiley: Pinkaaa I love that color
Grandpa: You're playing C.O.D -_- there is no pink
Miss Smiley: Pretend there is okay goodbye!