(noun)
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.
Damn bro, take a look at Ashley, she's got an absolute dumptruck!
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