N-Uncle means: Also written nunkle Lei.1 ; and in forms nunc m.Yks.1 Dor. ; nunk w.Yks. ; minks Dev. ; nunky Lan. [nirrjkl, nB-rjkl.] 1. sb. An uncle ; also used as a familiar term of address to an elderly man.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.