it is something you do to people. it ivolves, the shnufflepoo-ee (the one getting it) should be laying on their stomach. then the shnufflepoo-er (one DOING it) willjump in them, and dig their own chin into the recipiants upperback and rub vigoursly. you, have now recived/given a shnufflepoo
*kid fast asleep at a sleepover*
*guy jumps on him and digs chin into his upper back*
" O MY GOD!!!, what was that?!?!"
" HAHAH dude, that was a Shnufflepoo"