When you get an amazing feeling in your mouth. Eg. An 'orgasm' in the oral area (Mouth)
1. When you're in the shower and you turn your head and the spray brushes your lips. And it tingles.
2. When you eat something that tastes so good you just had an Orgasm in your mouth.
"OMG I just totally had a Mouth Orgasm"
A Abnormality/Mental disorder which involves stealing items from shops (Shoplifting) when a person does not actually need the item. But does it because they have the desire. Usually they find the feeling of stealing as satisfying as an Orgasm.
"Lucy is such a Kleptophiliac. She finds shop lifting better then Sex."