[KSUViolet06]

Example:

Let's say I get invited to preference round parties at XYZ, DEF, and ABC.

After the parties, I'm supposed to list those 3 on my final card, in order of preference. So if ABC was my fave, I would list them #1, and also put the other 2 as my 2nd and 3rd choice because I still like them and would take a bid from either of them if I didn't get one from ABC. This ensures that I've maximized my chances of receiving a bid because I have listed the max number of chapters allowed on a pref card. This does not neccessarily guarantee a bid (as there are instances where a girl is "cross cut" and doesn't get a bid from any of the 3), but it does help your chances immensely.
In contrast:


"Suiciding" is when I attend those 3 preference parties (ABC, DEF, XYZ) but in the end decide that I would ONLY accept a bid from my #1 choice (ABC) since they are my favorite. So on my final card, I only list ABC as #1 and don't list the other 2 AT ALL. So instead of having 3 sororities on my final card, I only have my fave, ABC. So I only have one option, and if I don't get a bid from ABC, I GET NO BID AT ALL on Bid Day (because I have no 2nd or 3rd choices listed).

It's called "suiciding" just because as you can see, it's risky. You have to be pretty sure that this one sorority wants you enough to give you a bid, and you also would have to be okay with going completely bidless if they didn't give you one. It's not impossible for girls to "suicide" and get a bid, but it's not the norm (since it is discouraged at most schools because they want as many girls to get bids as possible).