When you're the most bored person in the world, you decide to type
qwertyuiopasdfghjklzxcvbnm, then
mnbvcxzlkjhgfdsapoiuytrewq, then
qazwsxedcrfvtgbyhnujmik,ol.p, etcetera. You go through hundreds of combinations and try to find one that isn't already on Urban Dictionary. After around 69 years, you decide to start with the bottom row, going up once finished each row in an alternating fashion of farthest-left key to farthest-right key in the row.