The phrase plays on cash money as slang for something impressive or desirable, so saying not cash money became a shorthand online judgment for the opposite. Short reaction lines like this spread through soundboards, meme edits and short form videos because they can be reused without any setup or explanation. The clip stays useful because the situation is everywhere, from bad purchases and failed attempts to underwhelming reveals, and the flat wording lets creators apply it to almost any disappointment without needing the original context.