Typically someone who would be considered "ghetto," "trashy," or "ignorant." It insinuates that someone who is undesired due to the way they act or what they say, has trailer blood in them. That they are basically "trailer trash." It doesn't necessarily make them bad people, they just aren't that bright. It kinda goes with the line, "you can take the girl out of the trailer park, but you can't take the trailer park out of the girl."
I swear that girl makes the dumbest choices, it must be the trailerblood.
When asked what “the incident” at your school was, this is a common answer. An unsolved mystery, typically taking place at schools in small unknown towns, kids will find the bathroom covered in blood (usually an ridiculously large amount) and report it, but never hear anything back about what happened.
The wealth accumulated by media figures that make crude, violent, disgusting or repulsive content before they switch to a "softer" side and try to redeem themselves and all of the social flotsam they've helped create. Examples include Arnold Schwarzenegger, PewDiePie, Sarah Silverman, and The Weeknd.
Viewer: "Did all that cultural blood moneygo into funding your podcast?"
Sarah Silverman: "Yes and I now support Bernie and urban gardening."
When your girlfriend says "out for blood" and you mistake it for "alpha blood" and decide to make it a whole thing and create a definition for it on urban dictionary. Now, this will become a trend. Everyone will start using it and it will be a symbol of virility, strength, resolve and the unbreakable nature of human character.
Her: "*speaking through nose from a cold* wow, $100! That utility company is out for blood"
Him: "what's alpha blood"
Her: "Out for blood"
Him: "Alpha blood it is. I am a man with alpha blood. That sounds about right."