From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
offed /ˈɒft/
umgebracht, ums Leben gebracht, um die Ecke gebracht, abgemurkst, kaltgemacht, allegemacht
Synonyms: done in, done away, bumped off, put away, iced, wasted, whacked
see: do in sb., do away with sb., bump off sb., off sb., put away sb., ice sb., waste sb., whack sb., doing in, doing away, bumping off, offing, putting away, icing, wasting, whacking