More on Bitter as Gall from Infoplease:

• Bitter as Gall - Bitter as Gall as soot, as wormwood. Absinthe is made of wormwood. (See Similes. ) Source: ...
• Coloquintida - Coloquintida or Colocynth. Bitterapple or colocynth. (Greek, kolokunthis.) “The food that to ...
• Anne Bradstreet: Old Age - What you have been, ev'n such have I before, And all you say, say I, and something more. Babe's innocence, Youth's wildness I have seen, And in perple
• William Shakespeare: Romeo and Juliet, Act I, Scene V - Where's Potpan, that he helps not to take away? He shift a trencher? he scrape a trencher!
• Similes - Similes in common use: BALD as a coot. BITTER as gall,soot. BLACK as ink, as a coal, as a crow ...