Bulagaan (alternatively referred to as Bulagaan University)  is a veteran segment of Eat Bulaga! featuring hosts delivering "knock-knock" jokes in the form of a song. The segment is in a classroom setting, with the hosts divided into groups or pairs and usually dressed in school uniforms. Each group must answer the teacher's question by integrating their answer into a song of their choice. After performing, the group spins a giant roulette wheel ranging from 00 to 100, which will become the basis of their score. The group with the lowest score will be punished at the end of the segment. The hosts then go free-for-all, chasing and throwing cream pies at each other and at the studio audience.

The Eat Bulaga! hosts participate in the segment, but special celebrity guests may occassionally join the segment.