From German - English Ding/FreeDict dictionary ver. 1.9-fd1:
Spast /ʃpˈast/ <masc, n, sg>
[Jugendsprache] dumbass <n>, dumbarse <n> [Br.] , dipwad <n>, spastic <n>, spazz <n>, spaz <n>, wally <n>, muppet <n> [Br.] [pej.]
Synonyms: Blödmann, Idiot, Trottel, Koffer, Vollpfosten, Vollhorst, Vollkoffer, Spasti, Kretin
see: Blödmänner, Idioten, Trottel, Koffer, Vollpfosten, Vollhorste, Vollkoffer, Spasten, Spastis, Kretins