bring on oneself
1. To cause something to arise or happen. In this usage, a noun can be used between "bring" and "on." This warm weather is great, but it's also brought on my allergies, unfortunately.
2. To cause something unpleasant to happen to oneself. In this usage, a noun can be used between "bring" and "on." I'm not sympathetic because he brought this on himself by mismanaging his money.
3. To make someone or something appear. Stated as part of a request. We're celebrating tonight, so bring on the champagne! Bring on the opening act!
4. To recruit or involve someone in a particular activity or group. In this usage, a person's name or pronoun can be used between "bring" and "in" or after "on." With the sudden growth my business has experienced, I think it's time to bring on a graphic designer who can make my website look more professional. Once we bring Tim on, the team will be complete.
5. To cause someone to become sexually stimulated or aroused. In this usage, a noun or pronoun can be used between "bring" and "on." A: "Ever since I started taking that new antidepressant, it takes a lot to bring me on." B: "Wow, is low libido listed as a potential side effect?"
bring something (up)on oneself
to be the cause of one's own trouble. (Upon is more formal and less commonly used than on.) It's your own fault. You brought it upon yourself. You brought it all on yourself.