When you don't have nothing useful to say...
it's a very generic expression that you can use when you don't have nothing useful to say and you want the other person to smile!
Alif: I really think best porn actress is Jenna Jameson
Majestade: allow me to say it's not! i believe petite Kobe Tai is clearly the most gifted!
Damasio: Er...triki triki