"eloquent and insincere rhetoric," 1915, American English slang; see bull (n.1) + shit (n.), probably because it smells. But bull in the sense of "trivial or false statements" (1914), which usually is associated with this, might be a continuation of Middle English bull "false talk, fraud" (see bull (n.3)).
bullshit (v.)
by 1942, from bullshit (n.). Related: Bullshitted; bullshitting.
实用例句
1. All the rest I said, all that was bullshit.
我说的其余那些全部都是废话。
来自柯林斯例句
2. Don't bullshit me, Brian!
别骗我,布赖恩!
来自柯林斯例句
3. Don't try to bullshit me!
休想哄我!
来自《权威词典》
4. In short, all his rationalizing had been pure bullshit.