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1.
slang term for any lazy bastard who waits till you get up to get/do something, and asks you to get/do something for them as well, "since-ya" gettin up.
You get up to go get a beer..

Lazy Bastard: hey dude, since-yas.

Three other lazy bastards in the room: yeah, since-yas.

Now youre getting 5 beers instead of one.
by Hdogg-Burt October 26, 2010