to hit something or someone with a closed fist in an overhand motion intending to cause damage, similar to the way a hammer is swung using the tricep muscle. Usually quick and repetitive.
Brock Lesnar landed some mean hammerfists against Frank Mir.
A pistol developed in 1895 by colt for the growing concealed-weapon self defence industry being spawned by poor conditions in the inner cities. The parameters where simple, To create a compact pistol that would draw without catching on anything, fires a common round. The answer came in two versions, the 1903 pocket hammerless and the 1903 vest pocket hammerless. The latter was a scaled down version. The pocket hammerless fired .32 ACP and the Vest-pocket hammerless fired .25 ACP.
Both where very sucessful, infact, the pocket hammerless survived is a browning design that was produced by Fabrique Nationale in Belgium untill 1987. May have been one of the longest produced pistoles of all time.
"A 1903 pocket hammerless colt is concealable, light and easy on the draw"
In sex with multiple partner, 'hammerfisting' refers to the act of inserting ones fist into the vaginal- or anal orofice of a sex partner, whilst another sex partnerrepeatedly pounds the elbow of the inserted arm to create a hammer-effect.