Hookup

noun

1. (sometimes attributive) A connection.

   "I need to buy some hookup wire."

2. A brief sexual relationship or encounter.

   "He met his two most recent partners at bars, and expressed strong ambivalence and dislike of meeting partners online, but reported half a dozen additional hookups with partners met online."

3. A sexual partner.

   "The predominant way of finding a hookup or sexual partner would be going online."