A great Scorpio tattoo is a version of the letter M with a triangle arrowhead on the end representing a scorpion stinger. The M appears to be lower case script with a stroke heading into the letter and two curved arches before ending in an upward-turned, stinger-tipped flourish.
Although the symbol typically contains curves, the Scorpio M can also be angular or in nearly any font. As long as a flourish leads into the letter and the tipped flourish exits upward, the symbol is recognizable. This symbol makes for a great tattoo because of its simplicity and potential for variability.