“She’s a keeper” means that a person has found a good person for a partnership. “Keeper” in soccer (association football) means a “goalkeeper.”
   
”#manrules if she watches football… She’s a keeper” was posted on Twitter on September 8, 2009. “Let you watch football? She’s a keeper!” was posted on Twitter on September 28, 2009. “She’s a keeper, and I aint talkin’ bout a soccer goalie” was posted on Twitter on November 22, 2010.
   
“When your girlfriend comes home in a white suit, smelling of honey and covered in bee stings, you know she’s a keeper” is another “keeper” joke.
   
   
Wikipedia: Goalkeeper (association football)
Goalkeeper, often shortened to keeper or goalie, is one of the major positions of association football. It is the most specialised position in the sport. The goalkeeper’s primary role is to prevent the opposing team from successfully moving the ball over the defended goal-line (between the posts and under the crossbar). This is accomplished by the goalkeeper moving into the path of the ball and either catching it or directing it away from the vicinity of the goal line. Within the penalty area goalkeepers are able to use their hands, making them (outside of throw-ins) the only players on the field permitted to handle the ball. Goalkeepers usually perform goal kicks, and also give commands to their defence during corner kicks, direct and indirect free kicks, and marking.
         
Google Groups: alt.usage.english
She’s a keeper.
Jeffrey Turner
12/30/05
> On Fri, 30 Dec 2005 11:22:10 -0500, meth

wrote:
>
>
>>What does it mean when someone says a person is a keeper?
>
>
>  Could be someone who looks after property, like a park-keeper, or
> a household, as in housekeeper.
> Or could be a woman worth keeping, like the one photo out of
> five hundred shot with your new digital camera.
 
Or she could spend an inordinate amount of time standing at one end of a soccer pitch.
 
Twitter
James Vegas
‏@JamesFVegas
#manrules if she watches football… She’s a keeper. If she knows her Hip-Hop… Nigga she’s wifey.
11:00 AM - 8 Sep 2009
 
Twitter
Snipe Hunt
‏@readyaimshoot
Let you watch football? She’s a keeper! RT @Bryan_Fry Having a good night with my girl ...
12:41 AM - 28 Sep 2009
 
Twitter
off this.
‏@_KEVINRAE
..She’s a keeper, and I aint talkin’ bout a soccer goalie
8:15 PM - 22 Nov 2010
 
Twitter
Circle Jerk
‏@circlejerking
My GIRLFRIEND plays soccer; I think she’s a keeper [circlejerk] 7 points, submitted by Deusdies [self.circlejerk] http://redd.it/gmdyf
5:45 PM - 9 Apr 2011
 
Twitter
Roberto Rojas
‏@DoubleR203
If a girl is into soccer, you know she’s a keeper.
4:41 PM - 9 Oct 2011
 
Twitter
#TheLinkUp06Aug
‏@KingQuela_
If she watches soccer, she’s a keeper #NoGoalie
3:39 PM - 22 Nov 2011
 
Twitter
Chris Reinacher
‏@chrisreinacher
I met a girl playing soccer. She’s a keeper. @Popsicle #JokeSubmissions
6:13 PM - 12 Jun 2013
 
Twitter
Dan Norcross
‏@SpiritOfGomes
I met this girl at a soccer game
I think she’s a keeper
10:39 PM - 31 Mar 2014
 
Twitter
Jordan Monroe
‏@Monroseph
I met a girl at a soccer game….
I think she’s a keeper.
8:53 AM - 1 Apr 2014
 
BuzzFeed
67 Jokes That Will Make You Go “Ba Dum Tss”
Three men walk into a bar… Ouch!
posted on Apr. 18, 2014, at 3:45 p.m.
Tanner Greenring
(...)
33. I met a girl at a soccer game… …I think she’s a keeper.