Lipping is a verb. The verb is the part of the sentence that is conjugated and expresses action and state of being. See the conjugation of the verb lipping in English.

Is lip a noun or verb?

lip used as a noun:

A part of the body that resembles a lip, such as the edge of a wound or the labia. The rim of an open container. backtalk, verbal impertinence. "Don't give me any lip!"

What is mean by lipping?

1 : outgrowth of bone in liplike form at a joint margin. 2 : a piece of wood set in an archer's bow where a flaw has been cut out. 3 : embouchure sense 1.