O lol
Literally not caring about the topic or person, in the text conversation, and trying to make it as discretely obvious as possible.
Example:
"haha wanna know something so funny, my mum gave me her lucky condom"
"O lol..." (wow that's fantastic, I'm f**king dying for this convo to end)
"haha wanna know something so funny, my mum gave me her lucky condom"
"O lol..." (wow that's fantastic, I'm f**king dying for this convo to end)