Refers to an ass that is so phat, everyone in the room takes notice. You can't hide a dumptruck, you just gotta appreciate it. Dumptruck booties often jiggle while walking, are noticeable under any kind of clothing and attract the attention of masses.
Most notable when wearing skinny jeans, yoga pants, leggings, thongs or better yet; nude, a dumptruck is often perceived as very attractive and sexy.
a colorful variant of the words idiot, stupid, retard, moron, imbecile, dope etc... meaning literally that the person is roughly as intelligent as a 50 ton dumptruck
A big, perfectly shaped booty. Looks like an angel sent it straight down from heaven onto this unholy place. Sometimes it may seem to you that you actually saw God. It's an otherwordly experience.