For example, CD9, P911, MOS, and POS all mean “parents are nearby.” They’re used to quickly change the topic or switch to a different app.

Finsta refers to a fake Instagram account—often used to post things they don’t want parents or teachers to see. Then there’s Gas, 420, and OUID —all coded references to marijuana. The term Plug can ...

When parents glance at their kid’s phone, they might see strange acronyms like CD9, KMS, or LMIRL. Ask the kids what they mean, and you might get ...