* It's a mishearing or misspelling: Perhaps you heard or read something similar to "tot seffens," but the actual phrase is different.
* It's a regional or niche phrase: It might be a slang term or colloquialism specific to a certain region, community, or group of people.
* It's a fictional phrase: It could be a made-up phrase from a book, movie, or other creative work.
To help me understand and provide a more accurate response, please provide more context:
* Where did you hear or read this phrase?
* What was the context of its use?
* What language do you think it's in?
With more information, I might be able to shed some light on the history of this phrase.