Combining the word "bro" with the U.S. president Teddy Roosevelt's last name to form a more distinguished way to call someone a bro.
Phrase originally coined by Cool Dang Sarazing circa 2009. This phrase has become a popular insult/compliment to many people in the U.P. of Michigan.
bro 1 to self in mirror: what's up Theodore Broosevelt!
bro 1: "giggles to self"