Dope is a rather new slang word that is used to define someone or something excellent, great, impressive. OED says that it is originally in African-American usage and chiefly among rap musicians and
What is the etymology of "dope" meaning excellent, great ... - slang
Dope in the sense of information, particularly information that isn’t widely known or easily obtained, came directly from this practice. A whisper from the stables or some confederate telling a gambler which horses were being drugged was potentially worth a lot of money, so dope came to mean knowledge that drugs had been employed.
That's clearly clipped from the common construction as there are dope heads, hip-hop heads, meth heads and so on. Accordingly, the English wiktionary defines head (slang, countable) A heavy or habitual user of illicit drugs. quoting from 1968, Fred Davis; Laura Munoz, “Heads and freaks: patterns and meanings of drug use among hippies”, in Journal of Health and Social Behavior, volume 9 ...
Rope-a-dope is a strategy Mohammed Ali (boxer) used to outfox his opponent, George Foreman, in a match called the Rumble in The Jungle. He pretended to be beaten, falling on the ropes in the boxing ring so Foreman would pummel him. But the ropes absorbed the shock, and Foreman got tired. Ali won the match. I like Torture by email. Nice.
Fire as a slang adjective appears to be the bleeding-edge version of "cool." To some extent, the word appears to be interchangeable with dope. One thing that seems odd to me is that it often seem...
Now is the time for all good men to come to the aid of the party. From The Straight Dope: Cecil replies: From the typewriter it came, and to the typewriter it shall return: the phrase was proposed as a typing drill by a teacher named Charles E. Weller. Incidentally, many typing books now use the variant “Now is the time for all good men to come to the aid of their country” instead, because ...
The semantic development from ‘solid dope’ to ‘favor’ is hard to work out, and solid could easily arise as a nouning by truncation independently in different contexts: from solid N (N = dope, hash, etc.) in a drug context, from something like solid favor in other contexts — and, indeed, from solid pipe in still other contexts and from ...
Dope slap is the most common expression I know for striking someone in the back of the head with an open palm. The b -expression, which I will not repeat, usually refers to a different kind of strike, typically a backhand across the face (or am I thinking of the pimp slap?).