This form of obfuscation has actually already occurred over a century ago: https://en.wikipedia.org/wiki/Cockney_rhyming_slang
The example photo on Wikipedia includes the rhyming words but that's not how it would be used IRL.
[0] https://en.wikipedia.org/wiki/Polari
[1] https://languagelog.ldc.upenn.edu/nll/?p=6538 (CDT links broken, use [2])
[2] https://chinadigitaltimes.net/space/Grass-Mud_Horse_Lexicon_...