I didn´t find it really funny and it was kinda hard too understand it.
Also I don´t think this took very long to make it has only like 2 scenes.
It would be better... if you didn't use the same frames again and again. But still keep up the good work!
Sorry to say it but the animations where highly basic and the voice acting needs serious practice. On top of it the voice and the "mouth" movements didnt match.
Where to start
I was very disapointed when I realized this was not really an animation but a picture with mouths that moved out of sync with audio. I was even more annoyed when the dialogue amounted to nothing and that there was no story to this flash. I thought the voice acting for the guy on the left was alright but the guy on the right was really annoying. If you are going to make another flash please actually animate something or if you prefer the style of just simply 2 charaters in front of a background spitting funny dialogue back and forth actually make the dialogue funny and bring the charaters to life by animating facial emotions and they're eyes and please please sync the mouths with the audio. There are mouth kits you can download for flash with pre-set animations for each sound that comes out of a mouth. I suggest you get one of those.
Please put some effort next time. I hope this gets blammed to death.