In Roman mythology, Aequitas, also known as Aecetia, was the goddess of fair trade and honest merchants. Like Abundantia, she is depicted with a cornucopia, representing wealth from commerce. She is also shown holding a balance, representing equity and fairness. During the Roman Empire, Aequitas was sometimes worshipped as a quality or aspect of the emperor, under the name Aequitas Augusti.
Aequitas is the tattoo that one brother has in the film The Boondock Saints. His brother has a tattoo of the word Veritas. They represent justice/equality/balance/fairness and truth.
Aequitas is the source of the word equity, and also means "equality" or "justice".
"Dude whats that Aequitas tattoo that Murphy has on his hand?!"
"Look it up on urban dictionary newb"