Dirty Pizza Hut
When you have sex with someone who you can't keep to yourself and then (s)he is bisexual and you basically tell her/his bisexual partner, "(S)he is a Dirty Pizza Hut, no one can Out Pizza her/his Hut."
You to her bisexual partner: "(S)he is a Dirty Pizza Hut, no one can Out Pizza her Hut."