You've had to many chocolate chips or any sort of ice cream with chocolate chips in them. You could be high-per. Based of the term "shit-faced".
Chip-faced was said in "Miss Congeniality."
"Top me off pal, I wanna get chip-faced!"
Getting a stomachache or sugar high on ice cream. Just like getting shitfaced, but on ice cream.
Woman: Gimme a pint.
Bartender: Bad day?
Bartender: *hands woman pint of Ben and Jerry's™*
Woman's Friend: Hey, wanna go watch the game?
Woman: Not now. I'm getting chipfaced.
(adj) shitfaced, aloof, fuddle (v) the act of eating so may chips you literally have chips stuck to your face.
Ryan's a fucking dick, but he gets chipfaced errday with Stasi.