Ace - To do something very well, particularly an examination (verb); first-rate (adjective), or an expert (noun).
Afro - A bushy haircut of curly hair, as worn by some African-Americans.
Airhead - Someone who isn't very smart; a stupid person.
All ears - Listening carefully; keenly attentive.
All-nighter - A study or work session that goes through the night; studying without sleep ( usually a last-minute course of action ).
An arm and a leg - A large amount of money; very expensive or costly.
Ants in your pants - To be nervous or anxious or jumpy; to be unable to sit still.
Armpit - An unpleasant or backwards place; an ugly and undesirable city or area.
At the end of your rope - To be out of options or alternative courses of action; to be stuck in a bad situation.
Average Joe - Someone who is just like everyone else; a normal person.
Axe - To eliminate someone from their job; to terminate employment.
Back on your feet - To recover, usually from an illness; to feel better after being sick.
Back seat driver - Someone who gives unwanted advice; someone who tries to run things even though they don't have the power or authority to do so.
Back to the drawing board - To begin again; to repeat a process, often after a major setback.
Bad mouth - To say negative things about someone or something.
Baked - Intoxicated, especially after smoking marijuana; in a dazed state, resulting from drug consumption.
Ballpark figure - A good numerical guess; an estimate.
Basket case - Crazy; hopelessly broken down