siblings that are born less than a year apart.
mexican twins is when one child is born and then 10 months later, or so, another child is born.
by chicken jane September 24, 2013
Half-brothers or half-sisters born less than nine months apart. Usually caused by a father having an affair while his wife is pregnant
Maria: My cousin and I spent the evening looking through face book at people with the same last names and we found out I had a Mexican Twin in Pico Rivera.
by Dante84 May 15, 2015