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1.
A female who has the following characteristics:
(NOTE: It can be just one of them not all of them.)

A. Prude
B. Stays out of trouble
C. Plays sports
D. Gets good grades
E. Plays by the rules and listens to parents

In other words just a goody two shoes who doesnt like to have fun! This originated in Nebraska when girls on the soccer team would wear Green Jackets.
Dan: Hey Tom!

Tom: Yo dan what you doin tonight?

Dan: I dunno probably nothing I have to be to bed by nine.

Tom: LAWLZORZ! What are you a green jacket?
by hotshotsuperstar67832 July 15, 2009
 
2.
an annoying group of teenagers who are immature little brats who are prude and scared of any sexual references
Sally & Jane- "ewwwwww it's a penis!!!"

Dylan- "WOW they are such green jackets!"
by caity404 October 04, 2008
 
3.
(n.) the prize bestowed each year to the golfer who wins the Masters Tournament at Augusta National...but more importantly:
(v.) (-s, -ed, -ing) a) to absolutely and completely master something, b) to become master over something/someone
Alt. Spelling: Green-Jacket, greenjacket, g-jay
i)
Harold: "Yo man, how did your interview go?"
Kumar: "I straight up Green Jacketed that shit, son."
ii)
Harry: "Hey, how'd you night with Laura end up?"
Lloyd: "I g-jayed that vag all night long."
by twoods1 February 26, 2008
 
4.
A variation on a superman in which one ejaculates on ones partners back and then throws dollar bills on the ejaculate.

Named for the Green Jacket won at the Masters Golf Tournament at Augusta National.
I totally gave that stripper a green jacket last night.
by Mr. Tiger Woods September 09, 2010
 
5.
reffering to weed if talking to a friend on the phone, while a parent is present.
Hey, did you get my green jacket at Spicer's house last night, man?
by missbravo February 25, 2007
 
6.
reffering to weed if talking to a friend on the phone or face to face, while a parent is present.
Did you get my green jacket at Spicer's house last night, man?
by missbravo February 26, 2007