beatbox

letterbox (aspect ratio of film transferred to video)

trash can; bin

checkbox (a window item, on the computer screen, which toggles check/uncheck by a single click)

行っていらっしゃい: alternative form of いってらっしゃい (itterasshai)

see you later (said by a person staying, a stock phrase required by the Japanese etiquette, lit.: (after) going, come back)

everything

(colloquial) current boyfriend

everyone, one and all

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)