Bastardly

[Sarah]

adverb

1. Bastard-like

2. The description of one's actions being like that of a bastard

[Jessica]

verb: A combination of Dastardly and Bastard, whereby the actions of an individual or group constitute bastard like proportions of dastardly behavior. Premeditated and planned complex screwing over.

[Dianne]

1. Acting the same as a bastard.
2. A word that should have been used in every South Park episode whenever Kenny inevitably dies.
3. How a bastard child is conceived.