1 and ALL IN are terms that usually refer to poker games, and are often used in Texas Hold 'em, Stud, razz and other card games. It can also be used in spoken English to express extreme fatigue.

2. Specific meaning: adjective: all; All-encompassing; All kinds; As extreme as possible. pron:all； Everything; Everyone, everything; The whole situation. Adv: complete; Complete; Each; Very. N: all; [often A-] as a whole; Often used with my, your, his, her, etc. ] Everything.