joinleaver 

People who join your Discord server and then leave shortly thereafter or the next day so they can inflate their friend count. Basically another word for joinleaving.

Kyle: Ugh, why do people on my Discord server keep leaving as soon as they join?
Chris: They're joinleavers - they join and then leave just so they can boost their friend count. It's basically another word for stupid people.

joinleaver by The Real Driller April 3, 2022

joinleaving

Repeatedly entering and leaving a room quickly. Can be seen anywhere, but generally used on IRC channels when people are either being stupid, are having connection problems, or both.

<MatrixD> yeah, it was yesterday
>MatrixD has left the channel. (Quit: GOOODBYE)
>MatrixD has joined the channel.
<MatrixD> woops, closed the window
<Foxer> yeah, yesterday
>MatrixD has left the channel. (Read error: Connection reset by peer)
>MatrixD has joined the channel.
>MatrixD has left the channel. (Connection closed)
<Foxer> man, what's with MatrixD, he keeps joinleaving

joinleaving by TD9123 November 7, 2011