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4.
Voluntarily throwing up on someone's face after rendering them unconscious.
"After beating him senseless he gave him an irish breakfast."
by Frank Crowell June 20, 2006
 
1.
A pint of the black stuff, to start the day right.
'I can't think straight before I've had my breakfast'
'You can't think straight after it!'
by ant August 04, 2004
 
2.
Guinness and raw oysters, preferably both as fresh as possible.
We woke up, went out on the oyster boat and had a fine Irish breakfast before going home to beat the kids some more.
by Stuph July 16, 2004
 
3.
Self-induced vomiting on someone's face after rendering them unconscious.
"After beating him senseless outside the bar I gave him an irish breakfast."
by Teddy O'Bryant June 22, 2006