Let's Cinco de Mayo !
http://4.bp.blogspot.com/-iU5AJuGXT2E/TYB0rzTSzkI/AAAAAAAAAJU/WW7zhYZacB8/s1600/Brian%2BDiaz%2Bporn%2BAMG%2BMexican%2B2.jpg
https://1.bp.blogspot.com/-QaTfCT_DIMg/WQzuVis_bmI/AAAAAAAAxjw/MBh2GyWqdJcdM3Ah2rqj5tHHgSsuAwfuACLcB/s1600/Brian%2BDiaz%2Bporn%2BAMG%2BMexican%2B5.jpg
I put it in the same category as using "Bro". Its an attempt at being cocky or badass, and for me, my fratboy days were decades ago...... IMO, the term is useless...
He got a Leg up on the competition !
https://64.media.tumblr.com/e13d1e7d90536d5346df6569c4d54064/d2bec66972143ecf-6d/s540x810/bbaa2ca699f32a84d51bede6af59ece668c632f8.jpg