A derogatory term generally used for web developers; but mostly for a specific breed of web devs that never built non-trivial projects that are not web related, or used something other than web stack. They usually think that JS and Electron ( that whole stack) are the best thing since sliced bread, or more immorally, they think JS is a decent language. They jerk each other off whenever a new framework that does yet another anti-feature in a very convoluted way is introduced.
Oh, for fuck's sake, the webshits are losing their shit over a new JS framework that apparently helps you add left padding.
Term started by rapper and actor Childish Gambino (Donald Glover) as a parody of how meaningless phrases and ideas can be spread through the internet by people trying to be trendy.
A Wet Shit is when you wipe your ass fifty times and it still feels unwiped. So you end up putting toilet paper between your ass and your underwear so you don't ruin them with those dreadful skid marks.