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1.
When two bros are banging a chick. One does her doggy from behind while the other gets head in the front. in the process the bros give each other a double high five, therefore creating a tower like image.
"Dude we Eifled her last night."

"We Showed her the Eifle Tower."
by NoAIm1337 August 03, 2007
 
2.
when two guys are banging a chick an one has the ass the other has the vag and they are standing up high fiving one another
chuck and max did an eifle tower with deliah last night
by frenchie 8302 August 12, 2009