Please RSPCA to our wedding invite

Not so much a mixed idiom, or a malaphor, just an hilarious acronym mistake.

A mixture of:-

1. RSVP to our wedding invitation, where RSVP stands for Respondez s’il vous plait, and
2. The RSPCA, which stands for the Royal Society for the Prevention of Cruelty to Animals.

Reported by @lucysal on twitter

My brother in law does this so when they got married they had the incorrect phrases as table names. One was “please RSPCA to our wedding”. Top table was “best thing since brown bread.”

— Lucy Salmon (@Lucysal) October 25, 2021

Part of this thread on Twitter with @sarahkcomedy: