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.
A term often used in place of the word "Yeah" "Yes" "Alright" or "Okay", primarily by African Americans. It has become a popular term due to the fact of the rapper "Young Jeezy" stating this in some of his songs
Excerpt from Young Jeezy's "Standing Ovation"
ay...ay...ay...ay, Jeah! ay...Jeah!
OR
"Hey man you finally get some poon from that prude thing you call your girlfriend?"