Mwah

Mwah, mwa, or muah spelled out like moo--waah; like the sound you would make when giving someone a kiss or blowing someone a kiss is a term used online in chat to express a kiss. Below is an example of how this could be use din chat.

User1: Ok need to go cya later.
user2: Ok, LYL... MWAH!
User1: Ahhh thanks.