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Used to ask or express the validity of something beyond a reasonable doubt; another way of saying/asking "For real".
Example 1:
Person 1: "Ey man, You heard Joey's in jail?"
Person 2: "On set?"
Person 1: "On set, homie. I put it on my momma"

Example 2:
Person 1: "Ey man, did you for real lose that CD I lent you? Like, not even playing, on set."
Person 2: "Yeah, homie, my bad."

Example 3:
"Stop playing games. If you don't stop fucking around with me, on set; Imma whoop your ass"
by C.Corona June 19, 2013
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was developed in the 1880s as a summer camp meeting for Spiritualists. Many of the cottages still standing in Onset were built as second homes for individuals from Boston and other northeastern cities who gathered to hear mediums communicate with the dead. While it was run by the Spiritualists, the village was known as Onset Bay Groveay.Also located between Wareham and Buzzards Bay known for Wicketts island and spectacular summer festivities.There is still some areas that display indian sites here. Although plymouth rock is practically down the street from us...
Did Michael Jackson really visit Wicketts island in Onset Massachusetts?
by an individual in Onset January 08, 2011
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