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1.
Someone you like or admire, that appears in either the television, or video stream in the internet.
I have such a tube crush on that hot girl I saw in tv last night.
by eternity.youdesire August 31, 2008
 
2.
A hot person you see on the London Underground network, sneakily photograph and upload to tubecrush.net
Did you see that guy? He's definitely my tube crush.
by Koffers March 17, 2011