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1.-A very extreme danger. When things get so dangerous they transcend danger and become "Gangster Dangerous"

2.-Danger related to Gangster activity.
"Walking around in south central LA wearing a ku klux mask is very gangerous."

"Licking the pavement while driving at two hundred miles per hour in the wrong lane is a very gangerous thing to do."

"it is very gangerous to wear gang colors in the wrong territory"
by Rocketeam April 10, 2006