An abbreviation of 'Anas, Mias, Rexes, and Liams', used to refer to people who have the eating disorders anorexia (Anas and Rexes) and bulimia (Mias and Liams) as a collective.
Not a commonly used term, as most discussion around eating disorders is female-centric (as women are disproportionately impacted).
"AMRLs, I think everyone who doesn't want a BMI lower than 16 is a wannarexic."
"Shut the fuck up, moron."