A weak streamer is someone who doesn't have a very vital flow when they urinate, or takes a while to get the job done.
Calling someone a weak streamer is a hit on their manhood and is usually not taken lightly since it is a qualitative observation and not simply an insult. Could be considered fighting words.

A cultural and aesthetic mind-state that prioritizes making money, even as an “underground” or “radical” creator. The work isn’t made for money, but it’s the money that matters the most.