Zoey 101 (2005)

S2E13 Quinn's Alpaca

Quinn is feeling down because her pet alpaca, Otis, is sad and missing her, which in turn makes her feel blue. In an effort to lift her spirits, the girls plan an alpaca-themed party, but instead, it only intensifies her longing for Otis. Ultimately, she decides to leave PCA to reunite with him, risking suspension since it’s the middle of the semester. Meanwhile, the guys engage in a challenge to see who can avoid using any words with the letter 'S.' The loser faces the embarrassing consequence of running across campus in just a bikini top, a hula skirt, and a flashing red helmet.