A french word-play on the verb go.

Derives from areas highly populated with Cajun Americans, Louisiana State University Tigers fans, or more commonly both.

Cajun word...eaux makes a O sound so its GO!

A lot of Cajun names end in -eaux (comeaux, boudreaux, thibodeaux) with an "oh" sound. So a lot of local Louisiana teams use "Geaux (insert team here)" to play off of their Louisiana and Cajun heritage. The word is often thrown around by teams but a perfect example of correct usage would be by University of Louisiana at Lafayette, Ragin Cajuns.

A sound made to distinguish an awkward or inappropriate comment/moment.

A more extreme version of "yikes".

Originates from the season 4 episode "Fast Times at Buddy Cianci Jr. High" of Family Guy.