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2 major definitions. The first of which is a type of projectile vomiting on yourself whilst sleeping, usualy alcohol induced.

The second meaning is that of a person who sleeps with someone who they constantly claim they will never go near.
His girlfriend finished with him so he drank a whole bottle of vodka then did a robaidh

He slept with his bestfriends flatmate even though he had been saying all night that he would never touch the slut, what a robaidh
by erijefoijsefgoirgjswgr February 03, 2010
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