Ratatosk mode occurs when you're smoked yourself shitless and your eyes turn so red, even clear eyes cant fix it. When this happens you look like Emil from Tales of Symphonia Dawn of the New World.
A shape rotator is someone with high visuospatial ability. Contrasts with with wordcel, i.e. someone with high verbal ability.
It's a term based on puzzles used in some IQ tests that require the test-taker to mentally rotate or unfold a shape to see which shape it matches up with.