The behavior exhibited by internet trolls while they are trolling. This is similar to the unintelligent act of tomfoolery, except with intention of being a complete douchebag over the internet to people you don't know who more than likely would be able to kick your ass in person.

the thing that you don’t have when you’re phones percentage is over 20

Intentionally posting a message when it's likely, or suggested that you are parlaying it merely to elicit massive objectionable response. Generally used when you believe the OP (Original Poster, in this case, the one performing said trollery) is sarcastically disagreeing with said message.