The Collaborative International Dictionary of English v.0.48:
Swimmingly \Swim"ming*ly\, adv. In an easy, gliding manner, as if swimming; smoothly; successfully; prosperously. [1913 Webster]WordNet (r) 3.0 (2006):
swimmingly adv 1: with no problems or difficulties; "put the plans into effect quickly and smoothly"; "despite of some mishaps, everything went swimmingly" [syn: smoothly, swimmingly]