an extremely anoying phrase meaning "that is very typical of you". commonly seen following the equally agitating expression "but really".it is a well-known fact that you cannot win a logical battle with the "you WOULD" person. the only known comeback to "you WOULD" is "i DID", but does not sufficiently bring down the person. you must emphasize "WOULD" or it loses meaning and sense completely.
person- "omg i totally forgot we had a huge test today!"
idiot- "you WOULD forget we had a huge test today."
person- "i DID forget."
idiot- "but really."