1 definition by ChildFondler420

Originates from Chicago, specifically the Italian population. Some believed the mafia coined the term. Its commonly confused to mean a combination of Jag-Off and Homo.

Definition: Jack ass mother fucker.

Used a lot in road rage due to the piss poor driving in Chicago. Jagmo is almost always follows the word fucking.
You fucking jagmo where's my god damn money!?

Driver: WHAT THE FUCK?
Passenger: what's wrong man?
Driver: THIS FUCKING JAGMO IS DRIVING TO GOD DAMN SLOW!
by ChildFondler420 December 31, 2015
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