When it's wider around than it is long. As this prevents actual penetration from happening it forces the owner to pound around in the general vicinity of his target, hence the name mallet dick.
by #Splashback March 19, 2015

Word Association Game, Which each player must say a related word to one that was previously just said. The person who pauses or cant think of a word gets a bash around the head, often with a heavey object eg. a book.
The Game, Moisty's Mallet
EG.
Jack:'Football'
John:'Sport'
Jack:'Basket Ball'
John:'Net'
Jack:'Internet'
John:'Porn'
EG.
Jack:'Football'
John:'Sport'
Jack:'Basket Ball'
John:'Net'
Jack:'Internet'
John:'Porn'
by Cammers November 3, 2008

Variation of "Asshammer". Somebody who exists purely to pound on ass (see "malletize"). Usually a gay man or somebody who is suspected of being gay.
by C2Y August 6, 2005

When a man fake tans his penis resulting in it looking like a rusty mallet. (alternative definition: A heavy hammer object left out in the rain.)
by Poodefiner June 29, 2014

by crawford February 9, 2004

He is a mallet head; someone who couldn't pour piss out of a boot if the instructions were written on the heel.
by T. G. Moore October 27, 2006

by Bawbag Johnson June 15, 2018
