It means that you didn't even open someones message and ''seen'' it. You just see the part of it on your screen and don't want to responde. Later your excuse is that you didn't see it or sth like that
*message pops on your phone*
you look at itand it is from xxx and you dont want to respond.
I'll just mirtati. (not interested, dont want to look)
The smartest person you’ll ever meet who will always brighten up your day with a smile. She is sure to make you laugh whenever you are around her and is the sweetest person you will ever meet.