Region: UK | Usage example: They went the whole hog and redesigned the entire interface.

Go the whole hog

Meaning

Do something completely without holding back.

Used when someone invests full effort or resources.

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

An old English farming image where hogs were butchered entirely.

Popularized in the 18th century to describe total commitment.