slamming /ˈslæm.ɪŋ/noun 3adjective 1forms 3 noun3 •The act of something being slammed. •A form of fraud in which a customer's telephone service, Internet domain registration or credit card processor is changed without their consent. •Synonym of slam dance. adjective1 •(slang) Great; awesome.First off, how could I ever be a totally slamming, hot French expert on free-running. But, that technicality aside, I honestly don't want to be Henri. — 2006 formsslammings · more slamming · most slamming