Galmonging (or gallmonging) is one of several expletives used by Colonial Warriors of the Twelve Colonies.
Commander Cain's exasperation leads him to say, "Galmonging Cylons!" over a challenge presented by the Cylon Empire (The Living Legend, Part I).
"Galmonging" may also be a term of sometimes affectionate derision between comrades, similar to the use of the phrase "asshole" among close friends in Earthly company.