Matthew Blitz

Matt Blitz was the original 'blitz' who went to Wesleyan University in the 60's. He dropped out just before the school went co'ed. He, like all blitz's, had the catchphrase, 'Aw, Man'.

http://www.imdb.com/name/nm0088556/filmotype

Source: http://how-i-met-your-mother.wikia.com/wiki/Matt_Blitz