A colassualt is any cola related assault. This can include a fight over a can of Coke or pepsi, to be attacked or hit with a can or bottle of cola or a confrontation that occurs because of a cola/caffeine induced rage.
'Did you just see that girl colassault that guy. She smashed in the head with a half full can of Coke!'
by The Blinguistist February 14, 2013