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1.
a variation of the slang term 'bro' used for catholic irish white boys ONLY.

pronounced 'bro' (with the rolling of the 'r') chee-see-mo.
Ya dig, brochissimo?
by pseudonym3wery897689 February 23, 2011
 
2.
an alternate term for the slang word "bro" to be used by white Irish boys only.
Sup, brochissimo?
by pseudonym3u728789 March 05, 2011