A word with endless meanings which originates from Ryan Lochte, U.S Olympic Gold Medalist otherwise known as "Reezy" (best known for his rather interesting philosophical tweets). It's pronounced "jeer"
Instead of "The sandwich is HUGE" say "jeah jEAH JEAH"
Instead of "Duh" say "Jeah" in a monotone voice
You can use it for anything. Be creative.