texaboo
Usually used in a negative connotation, a "Texaboo" is an individual who is overly obsessed with, and loves everything to do with, Texas and goes out of their way to pass themselves of as Texans but is not a Texan in any way, shape, or form. A Texaboo could be considered the Texas equivalent of a Weaboo, but should not be confused with an "Honorary Texan", which is somebody who is not a native Texan, but has specific strong ties to Texas such as family roots lying in either the State of Texas or Republic of Texas.
Look at Ahmed... he thinks he's a Texan because he moved to America from (insert country name here)-stan a year ago, but he's really just a Texaboo.