When you sit on the toilet and jerk off into the bowl, while taking a shit.
Brandon was attempting a mushroom dump, but unfortunately had no luck, until Jerry came to assist.
The act of entering someones house without permission and using the nicest bathroom they have to leave the nastiest and most disgusting shut they'll ever see not flushed and partly not in the bowl. It works perfectly along side the "Iowa atomic corn bomb"
The other day some construction worker used my upstairs bathroom and left what they call "The Construction Dump" allover my toilet. It was filled with corn.
Fecal matter deposited into someone's dryer usually.
"Someone dropped a dryer dump at our party last night. I thought it was a brown sock and picked it up."
Loose, thread-bare fabric sagging in the seat of one's shorts that jostles about like one took a dump in their trunks. Occurs mostly to folks with odd-shaped bods and who believe shorts don't need washing as often as other garments. Will usually smell like bus seat and fecal grease in affected region.
"Connor can't get the smell of skid marks out of his mouth since he bit into Perry's filthy dump trunks."
Someone who hates whatever it is their hearing or doing by slouching their head and shoulders.
I accused my boyfriend of cheating on me for the millionth time and he did the dump slump.
Simultaneously taking a dump while brushing your teeth.
As a nightly routine, Johnny would always take a dump brush before going to bed.
A bowel movement of universal proportions
Excuse me for a minute, I feel a cosmic dump coming on.