Getting a whiff of poo or a dingleberry on your nose while in the act of performing 69 or any other act of going down on a woman.
I was with my lady last night and got a butterscotchnose drop while performing 69, it smelled like she ate a bean burrito for lunch, luckily I love Mexican food.
Someone willing to pursue revenge in a way that would damage oneself more than the object of one's anger, as in 'Cutting off the nose to spite the face'