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Temporary inability to piss when you're at the urinal.
"Sorry I couldn't come back to class quickly, Mrs. Johnson. I was suffering from mad piss lag."
by Plastic Platypus February 28, 2009
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(noun) A terrible simultaneous occurrence of jetlag and hangover, often due to free alcohol on a long transmeridian flight. A portmanteau of the English term "pissed" for drunkenness, and jetlag.
After seven tiny vodkas and 14 hours on the plane, Ben was sure to suffer pisslag on his first day back from vacation.
by kilna October 08, 2013
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