Geezer is a term for a man. It can carry either the connotation of age and eccentricity or, in the UK, that of self-education such as craftiness or stylishness.
Geezer may also refer to:
- Geezer Butler, the founding bassist for Black Sabbath
- GZR, one of three different names used by Geezer Butler's heavy metal band
- Kieran McGeeney, manager of the Kildare senior football team
- Geezer (comic strip), a character in the British comic The Beezer