Anacondas

An anaconda is a large, non-venomous snake found in tropical South America. They are found mostly in water, such as the Amazon River. Although the name actually applies to a group of snakes, it is often used to refer only to one species in particular, the common or green anaconda, Eunectes murinus, which is one of the largest snakes in the world.

An exceptionally large anaconda was the focus of the 1997 adventure/horror film, Anaconda. In the film, a documentary film crew, led by a director named Terri Flores, hire a boat to take them down the Amazon River so they can research an allegedly lost Indian tribe called the Shirishamas. The don't find any Shirishamas, but what they do find is a giant-ass CGI anaconda snake that attacks the boat and proceeds to swallow its contents whole.

A line from the Sir Mix-a-Lot song, "Baby Got Back" goes, "My Anaconda don't want none unless you got BUNS, hon!" He is of course, not alluding to an actual reptilian animal, but rather, to his penis.