The phrase "giant mecha" refers to a large, robotic machine that is typically controlled by a human pilot. It is often seen in science fiction or anime and is known for its size, strength, and ability to fight or perform tasks. Full definition
How much subtext should be expected from a film about giant monsters fighting giant mecha robots? (blog.cinemaautopsy.com)
The silhouettes of giant mecha lumber in the devastated, smoking skyline, sending ships to buzz past the rattling screen and robots to crash in front of you. (gamesetwatch.com)
Although it didn't improve my middling Titanfall skills, the Tyon did make navigating my way around a futuristic battlefield with giant mechas as simple as can be. (tomsguide.com)