+1 

1.) A post in a forum/message board that indicates the person agrees with a previous or quoted reply to a thread.

2.) Shorthand for "My thoughts exactly" or "me too".

Joe posts: "Urbandictionary.com is a great site for learning forum speak."

Floe responds: "+1"

+1 by Joe Mama April 28, 2004

+1 

As a telephone number, +1 represents the North American Numbering Plan - which covers much of the English-speaking Caribbean as well as Canada, the US and its possessions. It's much like the "+1" concept in event invitations - you want to invite Canada, but they won't come unless you let them bring their loud, obnoxious neighbor as a "+1".

Life was so much simpler before the phone companies found computers. Instead of singing "PEnnsylvania 6-5000" all of the musicians stand up and call out "[phone]" now? Where's the tradition in that?

+1 by bitchuck September 23, 2023

+1 

Used by forum posters when a person agrees with a point. Sometimes used incorrectly when referring to one's postcount going up.

Urbandictionary is a useful website

+1

+1 by JiTek May 19, 2008

+1 

Your Significant Other, Date, Wife, Hetero-Life-Mate, etc.

The person that goes along with you to events, or just accompanies you through something like a night out or the rest of your life.

From invitations and guest lists, ie. Gary Applebottom +1.

"i don't have a +1 for tonight..."
"sorry, couples only - put an ad on craigslist"

+1 by pcka February 25, 2009

+1 

A statement that shows the writer's approval of an aforementioned idea, phrase or concept.

Similar to 'like'-ing on facebook.

John - "Wow, that was the most amazing movie ever!"
Adam - "+1 to that, man"

+1 by Korsyn01 April 6, 2011

+1 

+1 is sarcasm directed to those who overjudge roleplay scenarios to the point where they might as well be recording interactions in a numerical system. It is used when an rper does something smart or innovative to push past the barriers of rp. For example, if a streamer kneels at a vending machine, points to it, makes it clear that they are purchasing it, etc.

:nerd: +1

+1 by doaidusaoduadoiaduads June 1, 2021

+1 

+1 is used on forums by spammers who want to raise their postcount by 1.

d00d posts: +1

+1 by Stiffer August 8, 2003