一か八か[ichikabachika] sink or swim
嘘っ八[usoppachi] downright lie
嘘っ八百[usoppappyaku] full of lies
嘘八百[usohappyaku] full of lies
八釜しい[kamabisushii] noisy

口八丁[kuchihacchou] voluble
三十八度線[sanjuuhachidosen] the Thirty-eighth Parallel
四苦八苦[shikuhakku] being in dire distress
四通八達[shitsuuhattatsu] traffic network extending in all directions
四方八方[shihouhappou] in all directions

卦算[keisan] paperweight
八卦[hakke] eight trigrams
八卦掌[hakkeshou] eight trigrams palm
本卦帰り[honkegaeri] reaching age of 60
有卦[uke] streak of good luck

六十四卦[rokujuushike] the 64 hexagrams (of the Book of Changes)
卦体糞悪い[kettakusowarui] extremely vexing
卦算冠[keisankanmuri] kanji "kettle lid" radical (radical 8)
卦辞[kaji] commentary (on any of the 64 hexagrams in the Book of Changes)