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definitions

bushwa

or bush·wah

[boo sh-wah, -waw]
noun
  1. rubbishy nonsense; baloney; bull: You'll hear a lot of boring bushwa about his mechanical skill.

Origin of bushwa

1915–20; perhaps representing bourgeois1, from its use in political rhetoric, the actual sense being lost; taken as euphemism for bullshit
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for bushwa
n.

also bushwah, 1920, U.S. slang, euphemistic for bullshit.

Online Etymology Dictionary, © 2010 Douglas Harper