Freak continues to be used to describe genetic mutations in plants and animals, i.e. freaks of nature. Freak can also be used in a verb form, and can mean: to become stressed and upset. Usually, in this form, the word is followed by out to complete the phrase, freaking out. However, this meaning and usage is usually considered slang. Adjectival forms include freakish as well as freaky. The verb freaking (or, freaking out) means engaging in panicked or uncontrolled behaviorfor example, as the result of psychedelic drug use. Freaking may also be a minced oath used in place of ****ing, e.g. Oh my freaking God! The word is a homonym of phreak (referring to the illegal hacking of telephone systems), which it probably inspired.