+1

From Internet forums such as Slashdot that allow users to vote for or against a comment, increasing or decreasing its score by one.

+1

1. (Internet slang) Used to signify agreement with the comment to which one is replying.

• like, unlike
• +0

+1

1. Alternative form of plus one
   • 2017, BioWare, Mass Effect: Andromeda, Redwood City: Electronic Arts, →OCLC, PC, scene: Night on the Town:

     Reyes Vidal has invited you to be his +1 at a party hosted by Sloane Kelly.

+1

1. To a high degree.
   • 2018 June 17, Barney Ronay, “Mexico’s Hirving Lozano stuns world champions Germany for brilliant win”, in Katharine Viner, editor, The Guardian‎, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 5 August 2019:

     There was a hint of structural problems for Germany from the opening exchanges. With Jonas Hector ruled out, Marvin Plattenhardt of Hertha Berlin had come in to play at left-back. Otherwise this was Germany to the max, Germany +1, with Mesut Özil included despite some whispered talk to the contrary, and the old familiar champion faces all over the pitch.

+1

1. (Internet slang) Used to signify agreement with the comment to which one is replying.

Sometimes 1 may be substituted by other numbers for a spoofing purpose. One common example is +10086.