Top Definition
The quick viewing of a back dated episode of the greatest show on international television, LOST. You generally only need to losterbate if you cannot contain your excitement for the next episode of LOST.
"Dude, Thursday is soo long from today!"
"Dude, you gotta engage in some losterbating. Try it with lube, it's way better."
by escapeartist88 January 31, 2008
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