Basically, the term "oops" mispelt by typing inaccuracy. Soon thereafter being given the definition of "underarm fat". Most commonly seen on elderly substitute teachers.
Substitue teacher: Good afternoon class. I'm Mr's henline, your substitue teacher.
As she proceeds to write her name on the blackboard...
Me: dude, do you see the oosp hanging off her arm? Fuckin' gross...
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