look up any word, like b4nny:
 
2.
An overboner occurs when an individual becomes excessively distraught or animated over an insignificant matter which other individuals do not find congenial.
Mrs Marsten in Tuesday Period 5 Chemistry lesson following Physical Education when a handful of people are quietly whispering about the lesson's work:

Stop talking (getting stressed). DANIEL SHUT UP! TOM MOVE TO THE FRONT. STAVROS FUCK OFF!
by Rob Dodds March 05, 2005
 
1.
Having an overboner is getting overexcited or stressed about a fairly trivial event. i.e taking something too seriously.
Edward Law (at lunchtime soccer): Come on guys, we're losing, COME ON!
Rob dodds: Meh
Ed: NO, we need to start playing, you're all so shit
Everyone else in unison: SHUT UP ED, don't get an overboner!
by Big Penis February 24, 2005