There are many synonyms for the phrase "prank call" that can add a bit of humor and mischief to your language. Some of the most popular ones include "hoax call," "crank call," "spoof call," "fake call," and "mystery call." Other funny options include "telephonic deception," "ring and run," and "phone-y business." Regardless of the term you choose, these playful activities can be a great way to relieve stress and have some fun with friends. Just be sure to exercise good judgment and avoid making calls that could be harmful or disrespectful.