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booty call

noun Slang.

a phone call, text message, email, etc., whose purpose is to arrange a meeting to have casual sex.
a meeting to have casual sex, initiated by a phone call, text message, etc.
a person who is invited to have casual sex by a phone call, text message, etc.

Origin of booty call

First recorded in 1990-95; booty2 + call
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for booty call

booty call

noun

slang a meeting arranged for the purpose of having sex
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012