Merriam-Webster's Collegiate® Dictionary, 11th Edition
BULLSHIT
I. noun
Etymology: 1bull & 6bull
Date: 1914
nonsense ,
II. verb
Date: 1926
intransitive verb to talk foolishly, boastfully, or idly, to engage in a discursive discussion, transitive verb to talk nonsense to especially with the intention of deceiving or misleading