Wiktionary
hammer throw
n. An athletic throwing event where the object to be thrown is a heavy steel ball attached with wire (maximum length 4 ft (1.22 m)) to a handle.
WordNet
hammer throw
n. an athletic competition in which a heavy metal ball that is attached to a flexible wire is hurled as far as possible [syn: hammer]
Wikipedia
Hammer throw
The hammer throw is one of the four throwing events in regular track and field competitions, along with the discus throw, shot put and javelin.