when one puts on a veteranary cone, shakes up a beer (preferably a yeungling) then proceeds to spray the said beer toward ones face and drink as much if the incoming beer as possible.
after jimmy was done shamrocking the beer justone gave him a hot carlson.
by steven douglas December 25, 2005
Yelling out loud and crying when you lose at a game you suck horribly at
He had been shamrocking for ten minutes because he sucks.
by xx4nik8rxx January 4, 2012
A green leaf with heart shaped petels. they can vary in number but you are most likly to find them with three leaves (four if you're lucky)
Jimmy never found a four-leaf shamrock and now he's dead....
by cailin beag August 31, 2003
(verb) slang, to hit somebody hard in the head or face.
That kid got shamrocked by Carl the other day.
by Cizzle Mayne January 19, 2008
Adj. Fucked; hosed; screwed. To have been dealt a low blow by someone. To be "shamrocked" is to be in very dire circumstances indeed, cf. shamrock.

(Origin: Shamrock Towing, a highly unethical company operating in the vicinity of Columbus, Ohio)
Dave talked trash to the wrong folks, and now his ass is shamrocked.

If you haven't dropped Differential Equations by the May 1 deadline, and you've flunked all the exams...all I can say is, "you're shamrocked, big fella!"

Twamley was feeling mighty shamrocked after he had to pay the towing company $45 for an illegal half-drop.
by Carl Willis April 28, 2004
The double handed action of your local bar tender as they top off your Guiness with said 'Shamrock' motif.

'To Shamrock' ; verb. To ladel your lover in an artistic fashion with your 'man muck'.

Post 'Shamrock' a wet wipe (or other absorbant material) is required. Its is advised to steer clear of using the curtains or other handy soft furnishings as febreze and vanish are not up to the job in hand.
"Why my sweet, do we have time for a 'Shamrocking' before we go to your parents for sunday roast?"
by furball69 March 16, 2010
when someone goes over the top in trying to show their irish pride. most often used to describe people of irish ancestory trying to show their "irish-ness" on St. Patricks Day
Guy One: Dude all these people look the same at this St. Patricks Day parade with their Guiness Hats, IRA T-Shirts, and lepercaun pants.

Guy Two: Yeah dude they're all totally Shamrocked!
by M. Harty December 5, 2006