Perish

  1. Me get married? Perish the thought!
    Is it correct English?
  2. Don’t take perished food, lest you should fall sick.
    2a. Don’t take perish food, lest you should fall sick.
    Which one is correct?
  1. is okay colloquially. It sounds very natural.

  2. ‘perished food’ would be correct, but ‘take’ sounds very formal and old fashioned if you mean ‘eat’.

Beeesneees,
What should I use for ‘perished food’?
How people are saying now?

‘Perished food’ is okay — it is ‘take’ that sounds old-fashioned.