Design a humorous graphic t-shirt featuring a cartoon-style sloth lounging on a branch, wearing oversized sunglasses and sipping a coconut drink. The text above the sloth reads, "Just Chillin'!" in a playful, bold font. The color palette should be vibrant, with tropical greens and bright yellows to evoke a fun, laid-back vibe. The overall design should appeal to young adults who appreciate a lighthearted take on relaxation and leisure.