Simplify the following text for a Grade 11 native English-speaking person.
Original: Bullshit ( also bullcrap , bullplop , bullbutter ) is a common English expletive which may be shortened to the euphemism bull or the initialism B.S. .
Simplified: Bullshit ( also bullcrap , bullplop , bullbutter , bovine stool ) is a common American English expletive .