Student culture at the University of Otago has been called into question after a number of shocking videos emerged online showing students forced to urinate and vomit on each other during wild flat initiation parties.

The footage is from various hazing parties dating all the way back to 2014, but have only surfaced online this week.

One Snapchat video from a flat hazing ritual shows students lying on the ground covered in red liquid, while other students force themselves to throw up on them.

The tradition of hazing for flat initiation isn't surprising to the President of the Otago University Students' Association, Hugh Baird, but he is worried that the latest footage shows it might be taking a dark turn.

"Normally initiation is a good time, it's fun for those people initiating and being initiated, but this is a step too far and there is a line.

"People generally know where that line is and things like these actions bring the whole thing into disrepute," Mr Baird told 1 NEWS.

He says anyone looking to do initiations in the future needs to be aware of not "crossing the line" in case the University of Otago stamps out the tradition and ruins it for future generations.

Reaction from students on the streets of Dunedin suggests the flat hazing rituals are part of the student experience at Otago University.

"Yeah we both did it, we just had to do a lot of drinking really, some of the guys ones can be pretty intense," two female students said of their experiences.

When asked what they meant by intense they replied the initiations involved "a lot of vomiting on each other".