Post Script. A way to add something you forgot after writing a letter.

The best answer to literally anything

pointless shit

originated in the croydon area a term use for describing money.
the short form of paper

1.Post Script

2.Pen Spinning

3.PhotoShop

4.PlayStation

Post Scriptum
Latin
When you want to add something to a letter, at the bottom.
When you want to add multiple Post scriptums:
P.S: "add text here"
P.S.S: "add text here"
P.S.S.S: "add text here"
...

Post Signature. The text written after a signed letter, below the signature. (After=post).

NOTE: incorrect: "Post Signature Signature". Correct: "Post Post Signature".