Hammy
Hammy may refer to:

People
 Hammy Baker (1893-1937), Canadian ice hockey player
 Hammy Gillespie (1898-1973), Canadian professional ice hockey player
 George Howell (soldier) (1893–1964), Australian non-commissioned officer awarded the Victoria Cross
 Hammy Love (1895-1969), Australian cricketer
 Hammy McMillan (born 1963), Scottish curler
 Hammy McMillan Jr. (born 1992), Scottish curler

Other uses
 Slang for Hamstring
 Overacting
 Hammy, a hyperactive squirrel character in the comic strip and film Over the Hedge

Nicknames
Hypocorisms