Engaging in sexual intercourse between the hours of 1 and 4am.

Can also apply to sex occurring within 3 minutes of waking up from an REM sleep.
"Yo Johnny, that's your 3rd cup of coffee before 10am, what gives bro???"

"Damn man, ran some midnight laps with the lady last night, never caught my second wind"
by Jrockwhc June 27, 2012
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