Nicholas means: Nicklas War.12 [ni'klas.] 1. In phr. (i) like Nicholas Kemp, he's got occasion for all, see below; (2) (Si.) Nicholas day, the 6th of December ; see below ; cf. barring-out.. 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.