OP stands for opening post. TS means threadstarter. The threadstarter is the one who started the thread. An opening post is the opening post of the thread, as written by the threadstarter.

"OP, I love your penis" is WRONG.

"Why did you use bad grammar in the TS" is WRONG.

I think using these wrong should be a bannable offense. Almost 50% of the time they are used incorrectly.

Please, don't be stupid.
Quote by korinaflyingv
On the come up we were listening to Grateful Dead and the music started passing through my bowel and out my arsehole as this violet stream of light. I shat music. It was beautiful.