a nickname of someone who maturbates alot.
p1> omg. ryan was so jacking off in math class!
p2> woo! go mustard fingers!

p1>hey mustard fingers! what'd you do yesterday?
p2>masturbate! what else, nigga!?
by fetusraper April 20, 2008
When a person goes to itch the inside of there ass cheeks not knowing that they previously did not wiped good enough. When they pull there finger back out and look at it, it has a light brownish tint covering it from sweat and feces that resembles mustard.
Dude my asshole was itching bad. I should have done a safety swipe before i scratched it because I ended up with mustard finger.
by Cangri518 September 05, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×