noun an act of mutual oral-genital sex. Dyson™ is the brand name of a vacuum cleaner that introduced 'dual-cyclone' technology which, it is claimed, provides improved suction; 'Dyson', as a sex-act, stresses the dual functionality of such suction. This is not the first use of a vacuum cleaner as a sexual simile: Electrolux™, another major brand, at one time used the slogan 'Nothing Sucks Like An Electrolux' which, unsurprisingly, lead to its use as an epithet for 'a fellatrix' UK, 2001