What's a fast way to shrink man boobs?

Gynecomastia: Depends how old your are, how is your weight? If you are young wait, lose weight exercise and they may improve. Ultimately plastic surgery maybe necessary.

If weight loss: Doesn't help, see a plastic surgeon about a gynecomastia reduction surgery.

Fat or breast?: If your breast prominence is due to being over weight then weight loss as suggested by dr fiala will make you happy. However, due to chemical, hormonal, genetic reasons, etc, a surgical procedure is very helpful to obtain a better contour.

Gynecomastia: Enlarged male breasts can come from a number of different causes. Before any treatment can be done, you must first have a complete physical exam and may need bloodwork to rule out hormonal issues. There are a number of medications that can also cause gynecomastia. Once all medical reasons are ruled out, one may consider treatment. You should seek a consultation with a plastic surgeon.