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1.
Indicates that a person(s)is making obvious boastful about themselves and/or their abilities. The term is said sarcastically, and "you" can be substituded with other pronouns.
You swear you're hot.

He swears that I like his ugly ass.

She swears she's all that in that leopard skin outfit.
by Greeno August 03, 2005
 
2.
you mean thats happening
"I just got some"
"You swear, got some"
by me August 08, 2004