1 definition by jackinthebox4444

SMEFNAR

Spontaneous Male Erection For No Apparent Reasons. Extremely common in High School classrooms where cleavage is abundant.

Sleeping in class is also a horrible time for Smefnars, although they are very common.

I was sitting in Math, and when she leaned over a SMEFNAR hit me...

by jackinthebox4444 September 14, 2010