An alloy is a mixture or metallic solid solution composed of two or more elements.

Aloysius (who sits with Mark halfway across the classroom): Why is it everytime you want to share something you tell Jerlyn first?
Mark: Cause she laughs at my jokes. You're too pure.
Jerlyn: ALOY? PURE?
Aloysius: Are you calling me impure? Is it because I'm an alloy?