punch a baby in the face 

To be overly:
confused
bored
mad
sad
temptatious
intuned
glad
or excited.

It is used to overly exaggerate that specific feeling.
And no, it DOES NOT literally mean anything. It's an IDIOMATIC EXPRESSION, it does NOT mean that you actually want to punch a baby in the face.

I'm so confused, I just want to punch a baby in the face.

punch a baby in the face by xFreedomx January 13, 2009

punch a baby whale in the face 

what you feel like doing when you're really, really, REALLY freakin' pissed.

"I'm so mad, I could just punch a baby whale in the face! Bam!"

"Wow, did you see Kelly when that dude told her she had small eyes? She looked like she wanted to punch a baby whale in the face!"

punch a baby whale in the face by I don't actually punch whales April 9, 2010