An awkward way to say "later" or "late" when trying to act cool. An adjective describing an assignment, application or form that is given after the deadline.
"So I'll see you in an hour?"
"Yeah, totally"
"Alright man! Lates Macgates"

"The bus is so Lates MacGates"

"It's past the due date. Your Prof is never going to accept your Lates MacGates paper"
by gdwbush January 14, 2014
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