Unvite

[Justin Bieber]

noun: An invitation to something where the [inviter] already knows theres no way the invited can possibly make it. [That way] he still gets [credit] for pretending to want to hang out with them.
verb: The act of inviting a person to an event, knowing full well that that cant make it, when you didnt really want them to go anyways.

[Agnes]

[Sending] an invitation very [last minute] with [the hope] invitee will already have plans. Unvites are used when you do not want someone to attend but NOT [sending] them an invitation would be rude.

[Monty]

To [un-invite] somebody. After you have given an invitation you change your mind and [go ahead and] un-invite them. Ref: from the [Seinfeld] episode

[Sonia]

When you see somebody you havent seen in [awhile], and you invite them to your [abode] with the [expectation] that they will not come over.