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1.
A noun used by elderly Germans to refer to the internet. It literally means "information highway".
Bob: "Yo, wasup, Nazi Grandma?"

Grandma: "ICH SURFE DEN INFOBAHN!!" (I am surfing the infobahn.)
by Randwulf August 26, 2009
 
2.
It's like the information superhighway (internet) ... in Germany.
Are you just gonna sit there surfin' the infobahn all day??
by Dann Cianca July 16, 2008