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1.
An all-encompassing mocking term that can be utilized as either: 1) incredulity about something, or 2) to completely blow-off another person.
Example 1:
Person 1: "I just won the Lotto!"
Person 2: "Yeahrightsure."

Or,

Example 2:
Typical Female: "I told you to take out the trash."
Male: "Yeahrightsure."
by Sidney P. Salgado December 09, 2010