1) The three honorifics used for women in the United States are: "Miss," preferred by unmarried women who to be recognized as unmarried; "Mrs.," pronounced like the word "misses," preferred by married women who want to be recognized as married; "Ms.," pronounced "Mizz," preferred by women who do not think their name should signal their marital status. 2) There are many contests that judge people's appearance and physical form. Many of them award the winner a title, on the pattern of "Miss America," like Miss Universe, Mr. Olympia, Ms. Olympia, and so on. "Ms. Olympia" is a real title. "Ms. Universe" is incorrect, the actual contest is named "Miss Universe." "Ms. Number One Tri-State Delts" sounds like a joke, and suggests that the whole sentence is a joke. 3), "Delts" sounds like an informal name for a college sorority whose name contains the Greek letter "delta," Δ. College fraternities and sororities are too hard to explain here, but they are combination social clubs and living facilities at many U.S. colleges. Most of have names consisting of three Greek letters: Delta Gamma, Kappa Delta Chi, and so forth. One of them, Delta Delta Delta, ΔΔΔ, is often called the "tri-delts." Thus "Ms. Number One Tri-State Delts" suggest a contest that is open only to members of some sorority, and that she won, not a national contest, but merely a contest in some "tri-state" area. Thus, the joke is that it names two important-sounding titles, and then a very-unimportant-sounding title.

Hello Dariana, She is a competitive body builder and "Delts" refer to the deltoid muscles, the muscle on top of the shoulders. The title number one tri-state delts would mean she had the best delts or shoulder definition in a competition open to women from 3 adjoining states.