tortilla wall
n.— «Alonzo cited the construction of a fence between Tijuana and San Diego, known in Mexico as “the tortilla wall.” It was completed in the 1990s and forced migrants into the sparsely populated and dangerous Arizona desert.» —“U.S. Border Fence Plan Upsets Mexicans” by Olga R. Rodriguez Forbes.com Oct. 5, 2006. (source: Double-Tongued Dictionary)