A cleansing of the body following a negative sexual encounter. Seen often in conjunction with cum horror and/or post-sexual fugue.
yeah, we had sex, but afterwords I had to take a shame shower.
When you get entirely too high by accident and need to "reset" your day by taking a shower. (Caution: Sometimes high is irreversible.)
Zeke Wonderhammer was forced into taking a shame shower after he realized he was too high to be a highly functioning member of society.