an old hag; granny. BBA is a shorthand for 婆あ or "babaa"; it's essentially a pejorative of お婆さん or "obaasan".

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

British Army slang acronym from around the time of World War 2 and stands for balls, bum and armpits. This referred to the areas washed when time is of the essence or water in short supply. It is somewhat similar to an airplane bath but less thorough than HF-AGBA. It was extremely common during the 1950s when National Service in the armed forces was compulsory in Britain for males between the ages of 17 and 21.

Badest bitch alive

As in Bourbon Barrel Aged. The best thing to ever happen to beer, but the worst thing to happen to your budget.

"Bachelor of Business Administration"

Typically a 4-year University Degree.

Majors for this degree could be Marketing, Management, Accounting, Economics, Finance, HR Management, E-Management etc.