:y

:y = kissy face
Typically used when a guy likes a girl and doesn't want to admit it so he sends a confusing yet flirtatious kissy face.

Girl:
'So how are things going with your family?'

Guy:
'Great! Thanks for asking :y'

Girl:
'what does ":y" mean??'

Guy:
'its just ":y"'
*Smirks