"Obviously, if you have typed that in, you must be insane!" That is what some people would say but you don't want to listen to those guys. but oh no no no, I am here to show you the light.
You're insane, they were right.
BUT, it does have a meaning, this term means something is absolutely improbable and out of no where.
You can describe ANYTHING as a bread with legs in an ice cube on water under sun.
"Oh Robbie over there? He is such a bread with legs in an ice cube on water under sun"
"That discussion was so bread with legs in an ice cube on water under sun"