When a man gets sexually aroused and 'horny' so he masturbates and when he cums he lets his seaman fly into the fish tank, killing the fish, but resolving his sexual fustration.
I had a wank last night and didn't want a huge mess all over the carpet so I did it in the fish tank!
Shit, i appear to have killed my fish.
Fish-Tank Wank's are the best!
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To pop a fish tank is to basically to finger a girl in her vagina really hard.
"Yeah man! I just straight popped her fish tank!"
"Dude, you pop a fish tank. NO WAY!"
"Nice!"
*High Fives*
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What you tell a girl to do when she isn't so fresh.
"Steven told his girlfriend, Sandy Fagina, your twat smells nasty and busted, you betta go clean your fish tank."
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A particularly large dose of man fat applied liberally to the inside of a woman's beef curtains. Ideally needs to be enough for a fair amount of drippage
Jon : Why didnt you answer your phone last night?
Ad : Mate! I was cleaning out the fish-tank
Jon : but i phoned back an hour later
Ad : Bow chicka wow wow
When a female has a smelly pussy, and traps you under the bed sheets.. much like the common Dutch Oven.
The hilarity of my boyfriend's dutch oven was quickly dissolved when I instead spread my legs and the dreadful smell of pussy entraped him in a tank of my vaginal fishyness. Boom, fish tank(ing).
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When you take a piss in a girl's mouth and while she gargles you jerk off in her mouth.
Dude: Hey baby, I heard about this new thing called the "mississippi fish tank", wanna try it?
Babe: Sounds weird? What is it?
Dude: You trust me?
Babe: Mmmm...yeah?
Dude: Open wide then, close your eyes, and try not too swallow.
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When you muff dive into a woman that is made of at least 55% body fat and come back out for air smelling like Nemo's abusive alcoholic uncle.
Hey Steve, you douchebag, after I took her out to a nice dinner at Popeye's we went back to her trailer where I gave her The 55 Gallon Fish Tank. Four showers later and I still can't wash her mush off my moustache. Overall, it was a great date with your sister. Asshole.