a-one; ace; break; break through; break up; chap; check; cleft; collapse; crack cocaine; crack up; cracking; cranny; crevice; crock up; first-rate; fissure; fling; fracture; gap; go; offer; pass; quip; sally; scissure; shot; snap; super; tiptop; top-notch; topnotch; tops; tornado; whirl; wisecrack;