Gigaforehead or a gigaforehead-moment, is a person/something that is insanely stupid. Because their forehead needs too much space and doesn't leave any space for a functioning brain.
by Balrog_bm November 27, 2021
a forehead that is able to be used for purposes such as, but not limited to: a project, doing homework, eating dinner. must be at least 3 feet long.
by Neelyboy December 12, 2007