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".

someone who is sexy beyond mean

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

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.

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

Similar to 'like'-ing on facebook.

A term used by D&D role-playing geeks to indicate that something is better than the standard variant. It often bleeds into online chat and forum posts.

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