From Latin 'mittere' (to send), via Old French 'mes' (food course) — food 'sent' to the table, then any disordered situation.
A dirty or untidy state; a portion of food served to a group.
From Old French 'mes' meaning 'portion of food, course at dinner,' from Late Latin 'missus' (a course at dinner), from Latin 'mittere' (to send, to put). Food was 'sent' to the table in courses. Key roots: mittere (Latin: "to send").