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2.
What is raised when idiots post on UD, or anywhere on the internet.

Even 4chan.
"...And in other news, national blood pressure is up due to a series of tube-related problems."

75 percent of UD descriptions make my blood pressure increase.
by OLOL August 20, 2007
 
1.
It's what the urban gang does to 'nother gang who show them no goddam muthafuckin' respect.
"Man, those bitches is dissin' us and we gonna put them under blood pressure."
by Wizards Sleeve June 12, 2006