zipgun

Freakishgun is likely misspelled.

Freakishgun has no English definition.

As a noun zipgun

is an improvised single-shot pistol-sized weapon that uses a spring or elastic to propel a bullet to its target.

As a verb improvise

is .

As a noun zipgun is

an improvised single-shot pistol-sized weapon that uses a spring or elastic to propel a bullet to its target.