The last name of "Thomas Nast," a German Cartoonist who is credited for creating the elephant and donkey representatives for the republican and democratic political parties of the United States of America, respectively.
See also: Thomas Nast
Magic: I just stuck my penis into that tree!
Jenna Jameson: You are so NAST!!!
Magic: Am I?!?!? (in a sexual tone)
Jenna Jameson: Ohhh Magic... stop that, ohh... uhhh... awww now there's nast all over my face.