A decision made by one member of a group when there is a lot of indecisiveness between a group of friends on their next move. It often comes when the zero-hour to make a move is near or has already passed. In an effort to prevent a lame time someone presses a decision past the zero-hour to salvage the day, night or "situation".

When announced the decision is not discussed and action is taken immediately by the group to make the decision a reality. The decision is always preceded with the statement "Alright I'm about to make a straight gangster decision..."

If you have any doubt people will not follow your decision keep your mouth shut, clearly you are not any type of leader.
Alright I'm about to make a straight gangster decision... everyone get fuckin' dressed and we're driving into the City to get fucked up and grind up on bitches even if they don't want it
by jbforreal December 27, 2011
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1. A term sometimes used in place of "erection" or "boner"
2. Something you say when you need something really random in order to distract someone, often used to make a hasty escape.
*Mostly said in the rhythm of the Old Spice commercial in which Terry Crews says "Pa-pa-pa-pa-power!" (straight-up-gang-ster-penis!)
*Variations include down-right gangter penis, boomeranger gangster penis, and upsided perfect penis
1. Lukas: Ok so if Ben is 2 years younger than Isaiah, and Katie is 5 years older than twice Isaiah's age, and Thomas is currently 1/2 of Katie's age away from being an adult, how long will it be until Thomas is a teenager?
Me:... Well i'd have to say... as long as it takes for him to get a straight up gangster penis!

2.Some guy with a gun: AYO BITCH IMA SHOOT YOUR ASS!
Me: ....Straight up gangster penis!
Some guy with a gun: ...umm... LOLWUT!?
Me: *runs*
by Wazson8 November 7, 2010
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