The act of shaving ones pubic area and saving it to be thrown on the face of someone pleasuring them. The shaver shoots the face of the pleasurer with his "fluids", then throws the pubic clippings onto thier face. Thus...Abraham Lincoln's Beard.
Friend 1: "Hey, check out this photo" (retrieves cellular phone/camera from pocket to show picture of disgruntled, now x-girlfriend, post Abraham Lincoln's Beard).
Friend 2: "Wow...I didn't know Abraham Lincoln had blonde hair."