"Tight, and tough, it''s very" is "빡세다"(ppak-sse-da) in Korean.
빡세다 (Bbakseda) is "tight, but very, tough" a slang manner say words. 힘들다 (Him dul da / painful) words that broke then. Study or work or was very, use, such as when you are cornered by busy. The words have been used are spread in North Gyeongsang Province. Opposite word 널널하다 (neolneolhada / loose).