The condition of your manbat when inside of very tight pum-pum. The puss cuts off the circulation of your fuckstick making the shaft blue and the head white. Therefore looking like a smurf.
Yo, I thought that girl I stuffed was gonna have pizza doughpuss but she gave me smurf dick.
"SmurfDope" reffers to methamphetamine that has a shade of blue. The cause of the crystalline substance (in this case methamphetamine) having that of a blue shade to it is the biproduct of methylamine being used as an alternative & higher quality ingredient.