It sounds like you're referencing a meme or a humorous custom text design often seen on T-shirts, mugs, or social media captions. The phrase plays on the wordplay of "ambulance" → "whambulance" (a slang term for whining or self-pity) and "cheater" instead of "sugar" (as in the classic "Call the ambulance... but not for me!" meme).
If you’re looking for the actual text (e.g., for a design or a tweet), here’s a clean version: Call the Whambulence My BF Is A Cheater — 2024 Call The Whambulence My BF Is A Cheater -2024- ...
Or sometimes just:
The full ironic / self-deprecating 2024-style caption would be: It sounds like you're referencing a meme or