Showing up uninvited 

in internet parlance, meant to convey the appearance of an unwanted or undesirable group of people that you weren't seeking out in the first place.

There was an interesting discussion about how to save up for retirement, but then all these bitcoin bros started showing up uninvited.

Showing up uninvited by JuliusCesarus July 11, 2021

shrowing up

shitting and throwing up at the same time

shelbert: omg what is going on in there?!?
chloe: don’t come in here, im shrowing up!

shrowing up by clurrrrrrrkurtnurrr November 16, 2022

Showin' Up 

Acting dumb to impress others; usually friends. Clowning

" Yo, Why you showin' up? "

Showin' Up by Anonymous May 13, 2005

showin up 

Acting dumb to impress others, usually friends.

ayo, why you showin' up ?

showin up by Anonymous March 27, 2005

shoving a copy of halo 2 multiplayer map pack up my bussy 

if you don't understand what the hell this is, you might be so retarded you considered doing this.

"i want to start shoving a copy of halo 2 multiplayer map pack up my bussy with you"
"hell no"

shoving a copy of halo 2 multiplayer map pack up my bussy by Tyronelexbengie May 29, 2019

Showingup

The act of facilitating the second method of discarding the body's waste while undergoing vomiting. To shit and throw up at the same time. To showup

Well I went to take a piss and ended up showinup all over the place.
Showingup- to shit and throw up at the exact same time, wether the excretion be solid or liquid.

Showingup by Cwurk April 28, 2015