1 definition by Seamour Butz
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.
Man, that guy wouldn't let me use his bathroom so I snuck into his laundry room and gave him a toploader!
by Seamour Butz February 11, 2010