Slangy agreement is a term used to describe informal, casual agreements between two or more people. It is often used in place of more formal terms such as 'YES' or 'AGREED'. The crossword solutions for the term slangy agreement are YAH (3 letters), YEP (3 letters), YEAH (4 letters), YUP (3 letters), and YEH (3 letters). These words are all variations of the word 'YES' and are used to indicate agreement in an informal setting.