1 definition by Christopher John Scott

Relationships:
When the girlfriend (or boyfriend) in a relationship desires to be with their partner for an annoyingly large amount of time, although not necessarily for more or less than five years, if at all an amount of time is specified.
Said partners tend to almost immediately wish to discuss marriage, children and growing old together, and are also very 'clingy' and choking. A common occurrence if it is one or both partner's first serious relationship, or if one or both parters are inexperienced in relationships.
Chris: Dude, my girlfriend's really choking me.
Graham: Why?
Chris: Ah she's started talking of marriage, kids, she wants to see me all the time...I think she's a five year plan girlfriend.
by Christopher John Scott August 29, 2006
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