Top Definition
Someone that builds things for Porsches that are the awesomest things ever that you would never use terms like oh noes or enzo to discribe.
I saw this guy with a bitchn' 944 turbo at the gas station and I asked him about the ball joints. He exclaimed Rennbay then drove away.
by Andrew (aka lolcat killer) December 10, 2007
7 Words related to rennbay

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