Blue streak

• blue: the colour of pen used by "Shem the penman" when inditing ALP's letter to HCE

• blue: obscene, pornographic

• blue streak: something moving as fast as lightning
  • Blue Streak

• blue-chip: a term applied in the stock market to the most reliable industrial shares, which are always highly valued due to public confidence in them → see bourseday

• blue streak: Ulysses had a blue streak on its dustcover (i.e. the Greek national flag) → Shem is Joyce, who wrote Ulysses