Ginsu

Ginsu is a brand of kitchen knives made famous by aggressive late-night television infomercials in the 1970s and 80s, which demonstrated the knives cutting through tin cans, then slicing tomatoes paper-thin.

The name, though Japanese-sounding, was invented by American marketers.

Ginsu has become shorthand for any product sold through breathless TV pitches or for the infomercial format itself: It's like a Ginsu commercial in here with all these free bonuses.