The practice of placing one’s penis in another person’s anus then slowly pulling out, resulting in the accumulation of feces just under and around the tip of the penis. After which the previously analed person eats around the edges of the penis, emulating the normal technique for eating a Reese’s Peanut Butter Cup
Girly: My boyfriend and I are looking for a threesome tonight. You DTF Kirill?
Kirill: Hell yeah...I would def share that nut with you!
Girly: Great! Tonight Im finally gonna try munchin on his Reese's bits...got any advice?
Kirill: There's no wrong way to eat a Reese's Pieces!