As Abed joins Jeff in drinking, he says "na zdrowie!", which is Polish for "to your health!"
First time the word "Beetlejuice" is said.
The dancing that Jeff and Abed do while drunk is a parody of the same dancing done in "The Breakfast Club".
In the beginning of the episode, when Pierce doesn't get a Valentine gift in the study room from the "Cupid Being," he says, "Who cares about getting things? It destroys the true meaning of Valentine's Day; the birth of St. Valentine." In fact, St. Valentine and most Saint's days commemorate the day the Saint died, not their birthday.
After "Chang's" outburst Abed mentions that after one Papa John's commercial he thinks he is Christian Bale. This is a reference to Bale's outburst on the set on Terminator Salvation.