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.