4 days post op Liposuction. Is it normal to have a squishy liquid noise when I push on the middle of my chest?

Hello dear!
Thanks for the question and provided information as well.
At the stage you are in, inflammation and swelling are very normal. 
I suggest my patients to try the lymphatic massages and to use a full body compression garment, 24/7 for the first 3 months, and after that, for 12 hours a day for 3 more months, to get the best results.
If you have any concerns, please follow up close with your plastic surgeon.
Good luck :)
 

What you are experiencing is not uncommon. Usually, swelling, bruising and abdominal pains are indicators of healing. However, it would be best to schedule an appointment with your board-certified plastic surgeon for an in-person examination as you may be developing a seroma, a fluid collection which may be managed via drainage in the office.