Read the dictionary definition of bull. All definitions for this word.
1. a serious and ludicrous blunder
1. he made a bad bull of the assignment
2. mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle
3. uncastrated adult male of domestic cattle
4. obscene words for unacceptable behavior
1. I put up with a lot of bullshit from that jerk
2. what he said was mostly bull
5. a formal proclamation issued by the pope (usually written in antiquated characters and sealed with a leaden bulla)
6. the center of a target
7. the second sign of the zodiac; the sun is in this sign from about April 20 to May 20
8. (astrology) a person who is born while the sun is in Taurus
9. a large and strong and heavyset man
1. he was a bull of a man
2. a thick-skinned bruiser ready to give as good as he got
10. an investor with an optimistic market outlook; an investor who expects prices to rise and so buys now for resale later
11. uncomplimentary terms for a policeman
12. advance in price
1. stocks were bulling
13. speak insincerely or without regard for facts or truths
1. The politician was not well prepared for the debate and faked it
14. try to raise the price of stocks through speculative buying
15. push or force
1. He bulled through his demands
See also:
Merriam-Webster definition of bull