to have it out
If you have it out or have things out with someone, you discuss a problem or disagreement very openly with them, even if it means having an argument, because you think this is the best way to solve the problem.
e.g. Why not have it out with your critic, discuss the whole thing face to face? [+ with]

quid pro quo
A quid pro quo is a gift or advantage that is given to someone in return for something that they have done.
e.g. [formal] They share a great deal of information on a quid pro quo basis.
Synonyms: exchange, interchange, tit for tat

fat chance
If you say that there is fat chance of something happening, you mean ironically that you do not believe that it will happen.
e.g. [informal, mainly spoken] 'Would your car be easy to steal?'—'Fat chance. I've got a device that shuts down the ignition.'

shrink [slang, noun] a psychiatrist or a mental doctor
dick [slang, old-fashioned, noun] a detective
5-0 [slang, noun] slang for police. Originated from an old cop show called Hawaii Five-O, aired from September 1968 to April 1980.

be stoked
If you are stoked about something, you are very excited about it.
e.g. [US, informal] "I can't wait to get there," she said. "I am so stoked about this trip."

psyche
1. [informal, verb] mentally prepare someone for a testing task or occasion.
e.g. We had to psyche ourselves up for the race.
2. [informal, exclamation] used when you fake someone out (i.e. deliberately mislead someone) and then immediately decline what you said, similar to "just kidding" or "bazinga".
e.g. "I had sex with a woman last night.""Really? How was it?""Psyche! Like I could get a woman huh?"

loaded
1. [informal] having a lot of money; wealthy.
e.g. "She doesn't really have to work—her family's loaded."
2. [US, informal] having had too much alcohol; drunk.
e.g. "Man, did I get loaded after I left his house?"

chase the dragon
[slang] take drugs
Originated from Hong Kong referring to inhaling the vapor from a heated solution of morphine, heroin, oxycodone, opium, etc.. The "chasing" occurs as the user gingerly keeps the liquid moving in order to keep it from overheating and burning up too quickly, on a heat conducting material such as aluminium foil.

patient zero
[US] used to refer to the person identified as the first carrier of a communicable disease in an outbreak of related cases.
e.g. Patient zero for the outbreak was suspected to be a 2-year-old boy.

touché
[exclamation] an acknowledgement of the validity, appropriateness or superiority of an opponent's argument or statement in a discussion.
e.g. "I want to go with you, Dad.""Don’t you have school?""Don’t you have work?""Ah, Touché."

gung-ho
enthusiastic or overzealous. It is an anglicised pronunciation of "gōng hé" (工合), a shortened version of the term "gōngyè hézuòshè" (工業合作社).
e.g. Joe is gung-ho about legalising marajuana in his country.

up the creek (without a paddle)
[idiomatic] in trouble; in a difficult situation.
e.g. We'll be up the creek if we lose those files, so we should back them up regularly.

bull's eye
[noun] the centre of a target, or a shot that hits the centre of a target.
[exclamation] a response when someone makes an accurate statement.
e.g. "Did John steal the petty-cash?" "Bullseye."

double-cross
[noun / verb] to betray or go back on
e.g. He wouldn't double-cross anyone for money.