Snapcheating 

Sending pics or chats over Snapchat to people who is not your significant other.

If he's snapcheating with you, he will do it when you're together too.

Snapcheating by Betty Harder November 18, 2017

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

snapcating 

When you catfish someone on Snapchat.

A 50 year old man is snapcating me with pictures of a 16 year old boy.

snapcating by thegirllefthimforabee February 1, 2019