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1.
Female version of cock blocked
When a girl blocks another girl from getting with a girl/guy
This bitch was trying to get all over this hottie, and I box blocked her
by sedes September 20, 2006
 
2.
When you are waiting to return your rental at a Redbox kiosk and the person in front of you is searching through every movie to find the perfect one.
When I returned my copy of The Dark Knight Rises at the Redbox, I was box-blocked for nearly 15 minutes while some jerk wearing pajama pants finally decided on The Best Exotic Marigold Hotel.
by Wordsworth Little January 14, 2013