Thread:PeridotIsWithYou/@comment-29505396-20170314145807/@comment-29781728-20170314194900

my ass is actually a common phrase that can be used to emphasize disbelief. a less offensive form of it would be "my foot"

it should be properly used in a form like this:

x? (x is slightly unbelievable event) my ass

for example

"you are bill gates my ass."