Jamming p. pr. & vb. n. : of Jam

Example:
How can i help prevent Jamming my fingers during football?

Taxonomy
free encyclopedia, rock climbing, search, music fanzine, free dictionary, surveillance, show-offs, social dancing, UK music, 1970s, 80s, apparent change, physical state, Exodus, mass media, jazz performance, disambiguation pages, Personal tools.

Defination from the web:
Jam session, a semi-improvised rock or jazz performance. A rock climbing technique. This disambiguation page lists articles associated with the same title. ... from "http://en.wikipedia.org/wiki/Jamming" Categories: Disambiguation pages. Hidden categories: All disambiguation ...