You don't have to be explicit if the connotations are that bad. Just a little hint will do, McGoo, LOL.
I guess Godfather's Pizza, Inc. will have to change its name now. Can't upseta da Eyetralian guys in da organization.
Leni
It's a derogatory in reference to the fact that poor Mexicans eat a lot of beans. Another food-related Mexican derogatory is "taco-bender".
Here is one source of info on the term "beaner"... Urban Dictionary definition of "beaner"