1. An abutment of sod raised 3 to 4 inches above the sand level of the bunker facing the putting green which prevents a player from putting out.
2. On a baseball or softball diamond, a slightly elevated ridge in the turfgrass adjacent to a skinned area, caused by the intrusion of skinned area soil into the turf, which can prevent proper drainage and inconsistent ball response; also referred to as a "mounded ridge."
A sample picture of a lip on a baseball field.
Source: Ohio State University Turfgrass Program