from the GNU version of the Collaborative International Dictionary of English
- adj. a kind of slang in which every word is written or pronounced backwards; as, nam for man.
from The Century Dictionary and Cyclopedia
- n. A species of slang in which the words are pronounced or written backward, or as nearly so as the skill of the speaker or writer, or the possibility of pronouncing the word, will permit: thus, penny becomes yennep; woman, namow, and so on.
Sorry, no etymologies found.