It's kind of hard to explain the word directly, but this example may help. The person talking a blue streak is carrying on a monologue rather than a dialogue. A 'streak', like a 'roll' in this case means a continuing successful sequence.
Covers on Twitter "Covers user "mctrap" is making a serious charge up
“在理智与疯狂之间，只有一道细细的红线。 ” 至于这句话的出处，大概说下 thin red line是一句俚语，指一群处于下风的部队坚守阵地对付攻击。源自thin red streak tipped with a line of steel.
Both mean to speak rapidly, in a burst, often nonstop.
To curse/swear a blue streak means. Picture a casino where john is. A streak means to start a consistent series of some activity.
