I think I saw a movie where someone is giving a pep talk.  They say
something like, "if they poke us in the eye, we will punch em in the
mouth, and if they punch us in the mouth, we will tear off their...". 
What is the source of this speech.

Hello Turtleboy

I believe the movie you are looking for is The Untouchables starring
Kevin Costner and Sean Connery.

Full details of this movie can be found here:
http://www.imdb.com/title/tt0094226/

The speech you are looking for in full is this:
Malone (Connery): You said you wanted to get Capone. Do you really
wanna get him? You see what I'm saying is, what are you prepared to
do?

Eliot Ness (Costner): Anything and everything in my power. 

Malone: And THEN what are you prepared to do? If you open the can on
these worms you must be prepared to go all the way because they're not
gonna give up the fight until one of you is dead.

Eliot Ness: How do you do it then? 

Malone: You wanna know how you do it? Here's how, they pull a knife,
you pull a gun. He sends one of yours to the hospital, you send on of
his to the morgue! That's the Chicago way, and that's how you get
Capone! Now do you want to do that? Are you ready to do that?

If you have any further questions on this subject please ask for
clarification and I will do my best to help.

Fast and Accurate

Here is a real-life quote from a sports figure:

"We've got to come out and play like men," said Jazz guard Raja Bell.
"If they shove us, we've got to shove them back. If they hit us in the
mouth, we hit them back. It's that type of game -- they try to bully
us around."

http://166.70.44.66/2004/Mar/03272004/sports/sports.asp