when the big booty broad you are dancing with raises her wide hips in the air and continues to wipe her dirty fingers all over the club floor while shakin her money maker.
you: "Did you see me out there with that big booty broad? Man, was she doing the dirty finger dance or what!?"
guy: "Ya, I prematured just watching."
The act of a person bending over and spreading ( his or hers ) buttocks while also rapidly contracting the sphincter muscle in the direction of others.
The act of laying on your back farting so hard you ass starts to gape then sticking your moist finger you have been sucking on for 20 minutes up your gaping asshole and farting a little to hard and getting some poo poo on you finger tip after your ass closes on your finger trapping it like a Chinese finger trap concealing your finger forever in your puckering anus.
when wiping your anus after bad mexican buffet, the single ply toilet paper rips. thus your fingers take a core sample of the terd thats chalked up in your crack. for the next week your finger reeks of the stinch thats under your finger nail !!!
The dirty fingernails method is when you are jerking off and you stick your finger up your butt and move it around. Said to give you 10x the pleasure when you cum
SpongeBob: hey Patrick last night I did the dirtyfingernails method to a picture of sandy
Patrick: ew that's gross! But how did it feel?