emu fume
Snot or protons?
Tin sanitary rat in a snit

They don’t seem so funny until you see the illustrations which totally crack me up.

Also I always have to think of my biochemistry class when I think of palindromes. We were studying something about DNA and how a certain enzyme will cut it at a palindrome. So for homework my professor had us all find one and bring it to class the next day. He then read some of the funnier ones out loud. Mine got one of the bigger laughs:
Nurse I spy gypsies! Run!
Good times, good times.

won ton, not now

which is incredibly simple, but I think that’s why it’s my favorite.

http://www.seeklyrics.com/lyrics/Weird-Al-Yankovic/Bob.html

Incidentally, if anyone didn’t get why I bothered to mention “Jeremy’s Iron”, it comes from The Simpsons episode “Lisa’s Rival”:

Taylor: Oh, don’t be modest. I’m glad we have someone who can join us in our anagram game.
Alison: We take proper names and rearrange the letters to form a description of that person.
Taylor: Like, er…oh, I don’t know, uh…Alec Guinness.
Alison: [thinks] Genuine class.
Taylor: Ho ho, very good. All right, Lisa, um…Jeremy Irons.
Lisa: [looks with consternation] Jeremy’s…iron.
Taylor: Mm hmm, well that’s…very good…for a first try. You know what? I have a ball. [pulls one from his pocket] Perhaps you’d like to bounce it?

Text taken from http://www.snpp.com/episodes/1F17.html.

twelve plus one = eleven plus two

For anagrams, plus a banner that appears with a new animated anagram everyday, I turn to wordsmith:

http://wordsmith.org/anagram/topical.html