Similar to "Writer's Block", "Maker's Block" robs those who are usually creatively gifted (see "maker") of their motivation and purpose, leaving them itching (see "maker's itch") to make something but repeatedly failing to find inspiration.
L: What have you been doing in here all this time?
L: So you're just sitting there, staring at this mountain of parts?
A: Yep. Maker's Block.