To meet up with/go home with someone during the night for an intense sexual encounter.

Nightcall is more than just a word, it's an erotic feeling that occurs at night, beckoning you to follow your carnal desires.
The moon had an ethereal feel to it and the air was thick with lust as their hot, naked bodies slammed into one another, driven by lascivious desires. It was a nightcall neither would forget.
by Sinderella318 June 13, 2018
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To get drunk and call your crush and/or your ex-girlfriend late at night
-Becky, I'm so sorry, let's get back together, please!
-Danny are you drunk? I can't believe you're giving me a nightcall
by DaddyNineteen April 12, 2013
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