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)
Example:
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.