Of extraordinary size; like a giant.

Such as a giant might use, make, or cause; immense; tremendous; extraordinarly; as, gigantic deeds; gigantic wickedness.

so exceedingly large or extensive as to suggest a giant or mammoth; "a gigantic redwood"; "gigantic disappointment"; "a mammoth ship"; "a mammoth multinational corporation"

Gigantic (A Tale of Two Johns) is a documentary profiling the band They Might Be Giants, featuring interviews with Frank Black, Sarah Vowell, Dave Eggers, and others. It was directed by AJ Schnack and premiered at the South By Southwest Film Festival in 2002. It was released in theaters and on DVD in 2003.