A special type of promise, whilst appearing sincere and genuine is never ever actually carried out. Often followed by insanely unbelievable excuses and lies, in an effort to subdue the expectations of it ever being fullfilled.
(Milan) Hey do you want to go the city? I have the car and I will drive so you can drink? No Serbian promise here, trust me.
(George) "Yeah sure I will see you at the time arranged".
(Milan) Sorry man, but my friend Bogdan reckons that the tyre pressure on my car will cause it to explode if I take it anywhere tonight".