when you put you finger into your boxers and gather up the sweet and poo onto your finger and rub it under someones nose, leaving the smell under thier nose for hours
person A: i was watching a porn. its was hot, but then the chick fingered her asshole.. and it had to smell.. like like like...
person B: like a poo finger?
person A: whats that
person B: look it up at www.urbandictionary.com
Did you hear about the Asian guy born without an anus? He saved his money until he was 55 so he could finally get it plumbed. Hope he had enough savings leftover for his Poo Finger.