Term used for those who cruise in a convertible with the top down and the windows rolled up. A car in this configuration appears like an aquarium or fish tank, especially after a good rain storm.
Check that geek
in the Miata
, he must be fishtankin it to keep his wig on.
The act of two people making out
with such fervor that it is audible to others around.
are making out
: Can you hear that?
: Is that the fish tank?
were making out the previous night)
Alexander: (sly look) So, I kept hearing a belt buckle last night...
: Yeah well, I heard you fishtankin'
it up! How about that?
Alexander: (holds head down in shame)
Nathan: (ultimate glory)