Si mi Tia tuviera ruedas, sería Una bicicleta 

Translation: If my aunt had wheels, she would be a bicycle

Used in response to someone saying lots of hypotheticals

Person 1: "Si estuviera presidente..." (If I were president...)
Person 2: "Y si mi Tia tuviera ruedas, sería una bicicleta " (And if my aunt had wheels, she would be a bicycle)

Si mi Tia tuviera ruedas, sería Una bicicleta by Drmakneeo November 16, 2014