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1.
A phrase designed to dismiss what someone has said in a manner both abject and sardonic. Its precise meaning is somewhere in between "Sorry for partying" and "Cool story, bro".
Ya bro
by smelios November 22, 2010
 
2.
An interjectory outburst created by C*****n H**d which can be used for near any occasion in which one shows agreement with what's going on. Usually said in less than half a second, in a quick outburst, with more emphasis and tone of agreement being put on the "o", and during a period of short pause in the main speaker's conversation.
Man #1: Let's go get some tacos.

Man #2: ya 'bro.

Econ Teacher: So when you want to start a business, you need money...

Student: ya 'bro.

...property...

Student: ya 'bro.

...resources...

Student: ya 'bro.

...labor...
Student: ya 'bro.
by MetroDyne January 12, 2011