If you thought you knew what all those cute little acronyms mean that your kids are using these days – think again.

Acronyms are widely popular across the Internet, especially on social media and texting apps, because, in some cases, they offer a shorthand for communication that is meant to be instant

But the issue, especially for parents, is understanding the slang that could signal some dangerous teen behavior, such as “GNOC,'” which means “get naked on camera.”

And it certainly helps for a parent to know that “PIR” means parent in room, which could mean the teen wants to have a conversation about things that his or her mom and dad might not approve of.

After you read this list, you’ll likely start looking at your teen’s texts in a whole new way.

1. IWSN – I want sex now

2. GNOC – Get naked on camera

3. NIFOC – Naked in front of computer

4. PIR – Parent in room

5 CU46 – See you for sex

6. 53X – Sex

7. 9 – Parent watching

8. 99 – Parent gone

9. 1174‘ – Party meeting place

10. THOT – That hoe over there

11. CID – Acid (the drug)

12. Broken – Hungover from alcohol

13. 420 – Marijuana

14. POS – Parent over shoulder

15. SUGARPIC – Suggestive or erotic photo

16. KOTL – Kiss on the lips

17. (L)MIRL – Let’s meet in real life

18. PRON – Porn

19. TDTM – Talk dirty to me

20. 8 – Oral sex

21. CD9 – Parents around/Code 9

22. IPN – I’m posting naked

23. LH6 – Let’s have sex

24. WTTP – Want to trade pictures?

25. DOC – Drug of choice

26. TWD – Texting while driving

27. GYPO – Get your pants off

28. KPC– Keeping parents clueless

(CNN)