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The jetlag-like disruption of your circadian rhythms that occurs on the Monday after Daylight Saving Time comes into effect.
"Sorry I'm late. I've got the goddamn DST-lag. It took three cups of coffee before I could wake up enough to leave the house."
by Adman12 April 03, 2006
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the sleepy feeling you get when trying to adjust to the new time for daylight saving time
chris: man i feel so tired

jim: why? what'd you do yesterday?

chris: nothing, i just got a little DST lag
by J-SLIK November 06, 2007
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