غثش is Arabic? If so give us a context, or the sentence where it found. However, غثس might refer to Goths the germanic trips. In some arabian delicate غثس means upset you. so if the computer upset you because it is working slowly, in arabic you say the computer غثس (GATHES) because it work slowly.

ساعف فاث بعؤن عح

I do not know?

Oh, so like that. Now I know. But I dont know how to read غثس in arabic?