I came across this when reading a comic strip in German the other day. I'm assuming that it's an interjection, if that's the term I'm looking for- something which would be shouted out rather than a word with meaning in itself. I'm assuming a scharfes S is used, although I couldn't tell as the text is all in caps. Any ideas? The context is one of jubilation / good cheer. "Heißa! Dann gibt's Geschenke!" If someone else was reading Strizz in the FAZ last week, they'll probably know what I'm talking about.