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1.
The masking of offensive body odor by spraying oneself heavily with cologne or perfume, due to lack of time to take a proper shower or bath.
"I was running late to work so I took an Irish bath".
by luckyfindz December 04, 2008
 
2.
Noun: (orig. Massachusetts, USA) the wearing of an excessive amount of cologne by a man (regardless of ethnicity), especially when this is done instead of showering. This is alternatively known as a Puerto Rican Bath in other parts of the country.
Sean was late for work, so he just took an irish bath on his way out the door.
by wayfarer March 16, 2006