A trout pout refers to a pair of lips that has had collagen injected to make them plumper. The phrase refers specifically to when the injections go wrong, making the lips look like a fish.
More About Trout Pout
A trout pout describes the over-plumped lips that have been injected with collagen. The intention is to have the lips look fuller, but when the procedure does not go smoothly, the lips look over inflated and resemble those of a fish. The phrase is similar to dick sucking lips (DSLs).
