To use the sock that you are wearing to clean up a small spill on the floor.
Lazier and quicker then getting a towel.
After spilling some coffee on the kitchen floor, Doug performed a sock mop and that kept his girlfriend happy.
To grow out your pubes extensively long, dip your balls in lotion and rub them all over someones forehead.
Maria: What did you two do last night?
Roxanne: He gave me a sock mop all night long.
Maria: Awe cool.