Film genre - abbreviation of 'romantic zombie comedy'. Originally used to describe the 2004 film 'Shaun of the Dead', directed by Edgar Wright.
'That "Shaun of the Dead"; best rom-zom-com I've ever seen!'
'Isn't it the only one?'
One who is adept at performing an action, usually piloting an automobile, one handed, while the other hand is engaged in an altogether unrelated activity, most frequently something rude or illegal.
Me: Shit Lisa, how can you smoke all that draw while driving a Chevy Tahoe?
Lisa: Duh, cos I'm the one hando commando.