The humor or irony in the sentence "P Diddy R Kelly STEP PREDATORS BY LOUMEMES" can be interpreted in several ways. Firstly, the lack of proper punctuation and misplaced capitalization create a sense of absurdity and unintentional humor. The sentence doesn't follow conventional rules of English language and the structure and spelling of that sentence might not be as one might expect. The sentence structures could lead to various interpretations and hilarious misinterpretations, inviting the reader into a shared joke over the grammatical anomalies.
Secondly, the juxtaposition of names P Diddy and R Kelly makes it unexpectedly funny. Both P Diddy and R Kelly are prominent figures in the music industry. However, they have very different, if not contrasting reputations. R kelly has a controversial reputation, including legal issues related to sexual misconduct, while P Diddy has largely managed to maintain a more positive public image, making the sentence even more ironic and absurd as the phrase implies they are working together.
Thirdly, the word 'PREDATORS' can be humorously seen as a wordplay. In its literal sense, predators refer to animals that hunt and kill other animals, However in the context of P Diddy and R Kelly, it could be seen as a shady or ironic remark about their reputation or personality. The enigmatic, all-caps 'PREDATORS' hints towards their notorious image in public, sparking an element of dark humor. It could also imply the competitive nature of the music industry, hinting that the musicians are preying on their competition.
Fourthly, there is irony given the fact that incorporating 'STEP' between P Diddy and R Kelly might interpret as either a collective stride towards a common goal or a step separating them. Pairing these two musicians with quite diverse histories, the phrase might mean they are ironically united or separated in their 'predatory' behavior, contributing to a sense of sarcasm or absurdity.
Fifthly, the nonsensical or cryptic ending "BY LOUMEMES" could be humorous to some. "LOUMEMES" is an unknown term and doesn't abide by any general English comprehension, which can be seen as an intentional misuse of language for comic effect. It might be a playful attempt to spoof internet culture, where misspellings, abbreviations, and nonsensical phrases often become memes and jokes.
Lastly, there's an element of shock humor in introducing a non-sequitur like 'LOUMEMES' after pairing two starkly contrasting music artists, and following it up with 'PREDATORS', a term with a strong negative connotation. The element of surprise in a sentence that otherwise seems to follow a predictable pattern adds to the humor. It's ironic given the unpredictability of the sentence, despite looking like a straightforward statement about these popular figures. P Diddy R Kelly STEP PREDATORS BY LOUMEMES