1. Kabedon, page 13
Literally, "wall slam." A move popular in anime and manga where a character slams their hand against the wall beside another character to assert dominance over the other character or corner them. It is particularly popular in shojo manga and can be used in either an intimidating or a flirtatious manner.
2. Bully, page 13
In the Japanese, Hime uses the term yankii, which is also a borrowed term from the English, "yankee," referring to the original inspiration from the post-WWII American GI culture of bad boys and rock n' roll. Most often translated as "juvenile delinquent," yankii reject social norms, manners, and expectations with flair. Stereotypically, yankii are known for their rebellious attitude—all of which comes through their affected language, big hairstyles, and flashy clothing. Yankii groups, like any gang, still maintain their own codes of honor, along with hierarchies. Here, Hime is referring to the rough and intimidating aspects of Tachibana's character.
3. Themed café, page 18
Themed cafés can refer to many dining establishments that cater to a certain topic. A cat café, where cats roam freely among customers who come to see them, is an example. As Kanoko mentions later on, the most recognizable themed café is a maid café, where servers are dressed up as maids and call customers “master” or “mistress.” As with any performance environment, most repeat customers are fans of the theme and its tropes, as well as the staff.