Semper Gumby is a Marine phrase. Where Semper Fi means Always Prepared, Semper Gumby means Always Flexible. Gumby comes from a kids show where the characters are made of Plasticine, and therefore flexible. The main character of the show is named Gumby. Actually, Semper Fi means "Always Faithful." The Latin for Always Prepared is Semper Paratus, the motto of the US Coast Guard.