Basically putting random shit in people's carts when they're not looking in the hopes that they either buy it without realizing it or it's really awkward for them because of what the item is.
Shitlifting is a form of mental masturbation, where one talks themself up by talking shit without backing it up with actions. It is a form of stroking ones own ego through words.
Words are cheap, don't say a word, it would only be for validation or shitlifting ones self ownershipanyways.
Like shoplifting, except for social media. Shotlifting is when you take a screenshot of someone's social media post and repost it to your feed rather than reposting their original entry.