A shit that leaves the toilet paper spotless.
"Denise, honey, why are you wasting toilet paper?"
"Oh, that's already been used... I had an immaculate."
"I know, but it can still be re-used."
"Oh. I'm sorry."
To be so "high" on the reefer that your face takes on a beatific grin. You see, know, and are one with God, i.e., Jah Rastafari.
That stoney fuck over there is stoned immaculate.