English Slang collection：
ace boon coon
[释] a best friend;
[例] As his ace boon coon, Tim knows Jack better than anyone else .;
[拓] ace boon coon;
ace in the hole
[释] a secret advantage;
[例] He's going to be re-elected for another term of office. He's got an ace in the hole.
aces
[释] adj. great;
[例] These fronts seats to the super bowl are aces.;
ace up one's sleeve = ace card = ace in the hold
[释] a secret advantage(手握王牌);
[例] He won the competition in the end as a black horse. Did he have an ace up his sleeve?
acid freak = acid head
[释] drug user，drug addicts;
[例] More clinics for drug addicts may help, but it doesn't go to the heart of the problem.;
a couple beers short of a six-pack
[释] alternate way of calling sb stupid;
[例] Oh..man! You're a couple...
