The phrase "giant dragon" refers to a very big mythical creature that is often pictured as a serpent-like being with wings and the ability to breathe fire. Full definition
There are moments in the battle sequences that actually look like real giant dragons fighting. (crunchonthis.com)
The latest DreamWorks adventure, shown in 3D and packed with action, thrills and flaps of giant dragon wings, is a quintessential popcorn movie, in which scale, emotion and adventure are all never less then epic. (rogerebert.com)
Some people want to argue that it's not as realistic as the female armor and to them I say «Just what exactly is realistic about fighting giant dragons that have elemental abilities with swords that are bigger than your entire body?» (teamworkcast.com)