A bar of soap that has been allowed to habitate a shower long enough to have attract a lush coat of pubic hair, resembling a small woodland mammal.
'Reaching blindly for the soap through the steam, I cringed as my fingers locked around the greasy, furry bar. I knew that I too was now a victim of the wily shower squirrel'
Shit, shower, and shave (the British military called it "ablutions") was a phrase that originated in WWI, where the US military tried to "train" soldiers to perform certain functions ( to shit, shower, and you guessed it) in the morning so as to not be interrupted during actual combat (WWI was primarily a "daylight" war). By the end of WWII, combat was a 24 hour event, and they could never actually TRAIN the body to crap on command, so the practice was dropped. I've never heard anyone use it who wasn't a veteran of WWII. My dad (a WWII marine) used to say it in the morning and assumed that I (A Vietnam vet) knew what he was talking about. I just thought to myself "gee, dad, that's a weird thing to share..."
the consequence of a shower tissue. it's a booger or a nasal slime that was just expelled from the nostrils, and hasn't been washed down the drain yet. So it slides along the shower wall, leaving a gross trail.
I ran out of napkins and tissues, so when I hopped into the shower I blew out all the snot. There were showerslugs sliding around everywhere after that.