+1

From Internet fora 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

+1

1. Alternative form of plus one

+1

1. To a high degree.
   • 17 June 2018, Barney Ronay, The Guardian, Mexico’s Hirving Lozano stuns world champions Germany for brilliant win:

     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 propose. One common example is +10086.