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1.
Any evil person or thing that is going to effect your chances of scoring
I was going to dive in but there were to many obstacles.
by brendan May 13, 2004
 
2.
obstacles are the people in your high school who are idiots and in the halls they are just in the way...
see obstacle course
"Jesus H Christ, Lexi is such a dumbass, she's a total obstacle"
by bigolbeefcurtain April 21, 2005