Flushchat

Verb.
: The act of sending a Snapchat (or other photo-communication media) to someone while using the toilet. Also used in situations to describe someone smartphoning in said bathroom.

Bro 1: "Hey, what are you up to?"
Bro 2: "Not much."
"AWWW, David just Flushchated me!"
Bro 1: "Haha, sucks to suck!"
"Jokes on you!"