When you take your dick, tuck it under the scrotum and taint, then tuck in real good and deep ‘tween your ass cheeks.
The family campfire was going great until uncle Frank came out the trailer showing off his shit-tucky mushroom.
My girlfriend has a shit-tucky mushroom.
It was within the hallowed walls of the gym locker room that observed the performance of the shit-tucky mushroom. I would never have believed it had I not seen it myself.