Geoff Wigington, known as Glef, Geoffus, and countless other names is a very sweet gentleman, always so kind and caring, and a really great man. Can be found on tour or in Texas.
Also written handwaving. In formal conversation / speech omitting important details about the subject matter either because 1) the audience is perceived to be ignorant 2) the speaker themselves is not well-informed on the subject matter or 3) a little from column A and a little from column B.
The math professor only gave a partial description of the proof as she used hand waving to get through the most difficult part and told the students to study the remained of the proof at home.