When a man sticks his finger up his ass-hole in order to tickle his prostate, causing an instant, extreme orgasm. The prostate (looking like a walnut) is commonly used as a sex toy for vietnamese people.
by reivergirlala January 15, 2009
 Get the walnuttingmug.
Get the walnuttingmug. by Pseudonyms 6969 March 20, 2016
 Get the Walnutmug.
Get the Walnutmug. by cgp24 December 14, 2010
 Get the walnutsmug.
Get the walnutsmug.  Get the walnutmug.
Get the walnutmug. Did you see Walnuts' speech last night?  You know, the one about inflation.  Did he look dead to you or what?
by Iacopus October 4, 2008
 Get the Walnutsmug.
Get the Walnutsmug. When your nuts are a little sweaty so they stick to the side of your leg. The pre-cursor to itchy nuts.
by Jawn June 4, 2005
 Get the walnutsmug.
Get the walnutsmug. 