a shit in the teeth
When your girlfriend or date has food stuck in their teeth, and it’s something gross like spinach or lettuce.
My date had spinach in her teeth, and it was a shit in the teeth.
He had lettuce in his teeth like a caveman, and I was like, ‘this is a shit in the teeth.’
She had a whole salad in her teeth. That was a full-blown shit in the teeth.