Although specific meanings vary from country to country, I will attempt to produce an exhaustive list here.

1) A generic term for achieving an advantage in a sports game (verb, occasionally noun).
2) An amount due; a debt (noun).
3) A grievance that is harbored and requires satisfaction (noun).
4) A group of 20 items (noun).
4a) The amount of 20 pounds (noun)
5) The act of securing an advantage, especially a surprising or significant gain (noun).
6) The act or an instance of buying illicit drugs (noun-verb).
7) A successful robbery (noun).
8) A sexual conquest (noun-verb).
8a) Kissing someone, esp French kissing them (noun-verb, largely Irish-centric slang).
9) An exclamation of pleasure when learning of good news.
1) "I scored three goals against the High School the other day."
"He got a score in on that ponce of a keeper."

2) "I've been meaning to settle that score with you for that plastering job."

3) "Me and Jim have a score to settle about that dog I ran over, bloody thing jumped in the middle of the road."

4) "Fourscore and seven years ago..."

4a) "He owes me a score from when he went down the chip shop."

5) "We're really got a score over them on this real estate deal."

6) "I've got the shakes awful bad, we've got to score like right now."
"Here's a score, now give us a tenner."

7) "That bank job the other day was a right score."

8) "I scored her last night and all, and she were screaming her head off."
"She was an old score, never mind her."

8a) "Ah yeah I scored that bird over there in the blue dress!"

9) "Ma's getting pizza! Score!"
by Cacodyl February 12, 2008
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"Hopefully i'll be scoring some heroin in the next hour or so.."

etc.. ;)
by your mom on a stick February 17, 2009
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Got laid. Had sex. 'Scored' mainly applies when getting laid for the first time with a person you have only just, or recently met.
1. "Man, I gotta go now, im gonne score big time with this Melissa chick"
2. " Oh damn, I scored big time last night..."
by Dr_Snapid November 2, 2005
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Getting with a girl (commonly used by football jocks)
Brock scored the hottest girl in school

After the game Im scoring !!
by Jock059 January 7, 2010
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