I can assure you it was a weird question and a bizarre concept to me the first time I heard it. However, I have come to understand through research and different presentations that I have a reptilian brain from time to time. I also discovered that you too - yep YOU TOO - have a reptilian brain.
I know... did she just insult me? NOPE. It's true. We all have a Reptilian Brain. It's our fight or flight response. Our gut instinct. Our first reaction. It's the part of our brain that sometimes gets us into trouble. It's the part of our brain that saves our lives in certain situations. The Brain
Our Reptilian Brain is a good thing. It's first job is to help us survive. It protects us from threats that come from outside and it allows us to adjust to changes in our circumstances. According to www.copingskills4kids.net there are a total of 8 functions of the reptilian brain. You can read about it by clicking the link: Reptilian Coping Brain

Sometimes however, we don't allow our feeling brain and our thinking brain time to respond and we respond with our instinctual or dinosaur brain. In those cases we sometimes end up responding poorly and later feel bad, embarrassed or sheepish. In order to avoid these inappropriate, humiliating and child-like reactions we can learn to cope through a variety of ways. Learning to Cope by Copingskills4kids has a variety of suggestions and some links for educational pieces. However, in short, we can learn to cope by watching others and seeing what works for them, we can try different strategies and keep the ones that work and throw out the ones that don't and finally we can make a conscious effort to learn coping skills from our teachers, guidance counsellors or online sources.

You get the idea. Sometimes it is worth listening to your Reptilian Brain. In fact, listening to your dinosaur brain may save your life. There are other times when you need to step back from a situation and allow your thinking and feeling brains to decide how you should cope with a situation.
There is lots of information on how to cope out there in the cyber world. Feel free to check it out. But remember to look for reliable sources and also... remember that parents, teachers, guidance counsellors, doctors and medical professionals may be even better sources from whom to learn about coping.
Picture sources:
http://www.wakingtimes.com/2015/05/07/8-reptilian-traits-in-human-beings/
https://www.dreamstime.com/royalty-free-stock-photography-reptilian-brain-image26662837
http://www.shawnphelps.com/2015/10/15/got-hatred-dont-feed-your-reptilian-brain/
Here are a couple of videos from WellCast that may help. Check them out if you have time
Stress Relief Tips:
https://www.youtube.com/watch?v=0fL-pn80s-c
Anger Management Tips:
https://www.youtube.com/watch?v=BsVq5R_F6RA