Disorderly fight (5)
(Other definitions for scrap that I've seen before include "Small fight about a smal fragment" , "Small amount; fight" , "Fragment or slang fight (5)" , "Discarded metal or slang fight" , "Just a fragment, maybe of food" .)
(Other definitions for brawl that I've seen before include "Abounding" , "Quarrel noisily" , "Melee" , "Rough, noisy fight" , "Affray" .)