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Preppy Sally is based off the phrase prep-rally. It was determined that there are two reasons for prep-rallies. A) to watch the 'hot cheerleaders' and the 'jocks' and B) to waste our lives away watching popular people show off. The phrase Preppy Sally was coined as a formal way of saying who the cheerleaders really are that we would watch at the prep-rally.

Formal way of saying bitch.
"We need a Preppy Sally at the office, she'd take care of anything we'd want her to."

"Now that cheerleader is a Preppy Sally!"
by Bray Dagner October 14, 2005
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