It means that some one is realy mad and angry, Verry mady! Like breaking things and just goes lose and wild!
REALY MAD! This word was founded in sweden ?
Two guys in the class annoys Daniel and he goes freaking mad and starts to throw chairs and goes wild, like a uncontrolled massacre. So one of the guys screams Daniel has DAMP! and everbody starts to run for ther life!