Goddamned means the same as goddamn. This use could cause offence.
英英词典释义
Adjective
1. expletives used informally as intensifiers;
"he's a blasted idiot""it's a blamed shame""a blame cold winter""not a blessed dime""I'll be damned (or blessed or darned or goddamned) if I'll do any such thing""he's a damn (or goddam or goddamned) fool""a deuced idiot""tired or his everlasting whimpering""an infernal nuisance"