Sneakchatting

When you take a Snapchat of someone and they have no idea.

Emily was sneakchatting Amber like crazy.

Sneakchatting by Emzilla October 5, 2015

snapchatting 

The verb form of using the application Snapchat.

Person 1: "Stop taking selfies! Don't you have enough pictures of yourself?"
Person 2: "I'm not, I'm snapchatting!"
Person 1: "Ohhh okay, carry on."

snapchatting by KaoruTsukino December 20, 2014