plus one 

your guest when you are invited to an event

"billy's gonna be my plus-one at jane's party"

plus one by c-line April 25, 2004

plus one 

Accompanied by a guest.

"Can you put me on the list for the 'Matrix' screening? I'll be plus one."

plus one by Matthew Michaud January 19, 2004

plus one 

At public parties and nightclubs, the guest of a person who is on the guest list, and who normally pays a discounted entry fee. Also, the state of having such a person.

"You are on g list plus one. Do not mention this to anyone."

"You can be my plus one."

plus one by Wrench January 8, 2009

plus one 

Usually written '+1', used in a forum post to indicate that the post serves no purpose other than to increase the poster's postcount. Usually used after an empty post along the lines of 'I agree'. Often used in a sarcastic manner to indicate the pointlessness of the entire thread.

I agree.

+1

plus one by Emperor Spleen February 4, 2004

plus one 

(noun) - the person who is invited to join an existing coupled unit in sexual activity resulting in a three way or menage a trois. Depending on the genders and desires of the couple, the "plus one" may even become a lucky pierre.

"'allo, are you two a couple? Fancy a plus one?"
"Nice accent. Where are you from?"
"Australia. And I'm only 16!"
"See ya'!"
"But I'd make a great Lucky Pierre!"

plus one by whirled-traveler January 15, 2009

plus one 

In engineering culture, "plus one" is used to indicate agreement to a stated position, usually used during a sprint retrospective; emphasis takes the form of "plus N+1", where `$N>0 and $N<∞`, with the only acceptable (unobnoxious) form being "plus 2". The written form is always expressed in shorthand, or "+N", where `$N>0`.

"We can incentivize engineers, to write documentation, by making it a requirement of user story acceptance". Most of the ops team muttered "plus one" and went back to ignoring the PM; the mostly invisible technical writer, Stu, sat up and shrieked "plus a million" and then shrunk under the glare of the few frontend developers that bothered showing up.

plus one by arnoldfriendly September 20, 2021

Plus One 

When a girl/guy keeps you as a side peice because your not good enough to be her/his official relationship.

Dont worry your my plus one.
Side peice

Plus One by Poop poop 69 June 23, 2019