A ventriloquist is working in a local town and during his show a local stands up and yells, "Hey you on stage! You've been making remarks about us small town folk being stupid all night long! We're not all stupid, you know!"
"Relax" said the ventriloquist, "They're just jokes!"
"I'm not talking to you!" The man replied, "I'm talking to that little fella sitting on your knee!"
A ventriloquist is a person with a doll on their knee. The doll opens its mouth while the person speaks and it looks like the doll is speaking. Now what kind of profession is that?!
Yell means the same as shout
Fella is a short form of fellow, which means man.