Smut may refer to:
- Smut (fungus), a group of plant parasitic fungi
- Smut (comics), an adult British comic title dating back to the 1980s
- A colloquial term for obscenity
- A colloquial term for pornography
- "Smut" (song), satirical song on obscenity by Tom Lehrer
- SMUT (business) - A vintage variety and vinyl record store in Portland, Oregon that opened in 2003. It is a well known stop for rock bands and other famous personalities while in Portland. The store has been featured on NPR radio and CBS' Sunday Morning Television program. The store is noteworthy for the fact that its owners, now married, met through the sale of a vintage leather jacket at a popular Portland nighttime flea market.
