Acronym for "No Apparent Reason Boner", often the bane of male junior high students and some high school students everywhere. They seem to occur at the most inopportune moments such as right before the bell rings and when a teacher calls you to the board or their desk.
Wes: "Hey everyone look, JT has a NARB!!!" (Everyone points and laughs.)
Apart from being the acronym for “no apparent reason boner”, it is also used by people in place of the term noob to try and make themselves sound cool. It is most commonly used in online games.
Person1: How do I make money?
Person2: Stfu narb
Person1: Are you calling me a boner?
Person2: Omg It can also mean noob you narb!
an acronym that stands for a "No-Apparent-Reason-Boner", often occuring among middle-schoolers and sometimes high-schoolers. the N.A.R.B. can be hidden if one knows the proper techniques