1. [1910s+] (orig. US) to be annoyed, to be angry, to talk aggressively.
2. [mid-19C; 1990s+] (also get someone’s steam up) to annoy, to infuriate.
[1960s] (S.Afr.) a person who incites another to commit a crime.
1. [mid-19C-1910s] (also get the steam up) to become angry or emotional; usu. as steamed (up) adj. (2)
2. [1930s] to energize someone, to stimulate emotionally (or sexually), to arouse; to infuriate someone.
3. [1940s] to speak emotionally.
4. [1950s] to get oneself drunk.