When you scratch your ass and you end up with poop under your nails. This can also be achieved if your finger pokes through the toilet paper while wiping.
by rxlouden August 6, 2016
Get the Rusty Nailsmug. He is some kinda odd creature who wears leather pants with a silk shirt...is sexually confused likes to burp very loudly to attract mexicoons and raccoons Opens funhole every widely for random travelers who need to unleash a deadly STD
by Whoopy Fee March 16, 2004
Get the Rusty Nailsmug. by scotty June 30, 2003
Get the Rusty Nailmug. by Ultraback January 21, 2016
Get the Rusty Nailmug. by carbombxhooligan December 13, 2004
Get the Rusty Nailmug. Fucking a girl on the rag, without washing up afterwards, and you wake up in the morning with a bloody morningwood. Resembling a rusty nail.
by Bruce S Johnson September 4, 2009
Get the Rusty Nailmug. by Johnny Tsunami Loves The Poonani July 8, 2006
Get the Rusty Nailmug.