There are many synonyms for the term "slippery eels." Some possible options include "deceitful individuals," "shifty characters," "untrustworthy people," "conniving snakes," and "sneaky serpents." These synonyms convey a sense of slyness, sneakiness, and dishonesty, and may be used to describe people who are difficult to pin down or who seem to constantly change their stance or opinions. Alternately, the term "slippery eels" may also be used to describe situations or endeavors that are difficult to navigate or control, such as risky business deals or convoluted political negotiations. Ultimately, the use of synonyms can help to add nuance and complexity to language, allowing us to more accurately and meaningfully describe the world around us.