booty call

Short definition from Wiktionary

Noun

1. 1
   A telephone call made to request a sexual encounter.
2. 2
   A sexual encounter arranged by telephone.
3. 3
   The recipient of a telephone call requesting a sexual encounter.
4. 4
   An encounter for the purposes of casual sex.

Verb

1. 1
   To make a booty call.
2. 2
   Alternative form of booty call.