1. slang Foul, disgusting, or unpleasant. We need a more powerful cleaner to get rid of this icky-poo gunk in the bathtub. I'm starting to get the icky-poo feeling that I shouldn't have said anything in front of her.
2. slang Overly sentimental. I don't need some sappy card and a box of chocolates on Valentine's Day—I hate all that icky-poo stuff.
1. mod. disgusting. I don’t like all this icky-poo talk.
2. exclam. Nasty! (Usually Icky-poo!) Oh, icky-poo! I missed my bus!