5C Challenge
The challenge put to every 5C student (i.e. students of Pitzer, Scripps, Pomona, Harvey Mudd, and Claremont McKenna) to hook up with at least one student from all five schools. In this case, it is generally agreed that "hook up" refers to sexual intercourse.

The challenge is a bit trickier for female students, as Scripps is an all-women's college.

The challenge was allegedly placed to mitigate the excessive inbreeding that occurs within each of the five schools.
"I've almost conquered the 5C challenge, but I can't find a fuckable Mudder."

"No, CMC student, date rape does not count toward fulfilling the 5C challenge."