"Phew, you stink." "Wow, somebody woke up on the wrong side of the Sewer."
Do you have a curse? can you tell? no, of course not: go to a Temple with a priest, otherwise everyone else will have free tracking of you - your odor - and you.
Courtesy of a Zombie and /or Poison Elemental. At least you can "thank you"r lucky Moons it wasn't Babble, a Babble curse.