This is taken from the awesome television show Dexter. It makes fun of when one of characters sneaks up on another and yells, “SURPRISE MOTHERF***A”. The internet has tastefully replaced ‘surprise’ with malapropisms, or words that sound similar to a word. The results are absolutely hilarious as each is absurd as the last.
On another note, if you’re not watching Dexter, you need some more blood splatter in your life. Start now and you won’t regret it.