An excruciatingly prolongued exchange of not very witty repartee exchanged by the cerebrally challenged masquerading as a debate on internet forums.
"Loud pipes save lives"
"No they don't, daylight riding lights do"
"No they don't, they encourage risk taking"
"I don't take extra risks"
"You don't know how to ride"
"You kiss my ass"
"Don't talk to my mate like that"
Repeat for 26 pages of ming mong ping pong
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"