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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for I'm SO annoyed!:

SPLITTINGHEADACHE: You think I'm annoying? Fine, I'm outta here.
GAH: I'm SO annoyed!
ARGH: I'm so annoyed!
GRR: I'm so annoyed!