ROT
WordNet
noun
(1) Unacceptable behavior (especially ludicrously false statements)
(2) (biology) the process of decay caused by bacterial or fungal action
(3) A state of decay usually accompanied by an offensive odor
verb
(4) Waste away
"Political prisoners are wasting away in many prisons all over the world"
(5) Break down
"The bodies decomposed in the heat"