If you've got something to say, just say it straight out.
Tips
usage
AABB form of 痛快. Two flavors per Xinhua: (1) blunt, decisive — no dithering; (2) thoroughly enjoyable — without holding back. Context picks which one: 痛痛快快地说 means speak frankly, 痛痛快快地玩 means go all-out having fun.