The act of defacating in somebody's washing machine. Similar to an "upper decker" the toploader has the advantage of not only being more inconvenient to the victim, but also much funnier to the person performing, as well as their friends. The toploader is a serious commitment to pranking and should only be used when the victim is a total douche, or it would be really funny to everybody else.
n/ A communal spliff with most of the marijuana packed tightly at the top, so the first person to smoke it (usually the one to roll it) gets a far bigger high than the others.
p.n/ Someone who rolls one of the above.