1. (orig. US) intense, serious, committed.
|Heart Specialist 252: It’s an extra-sized, over-stuffed, heavy-duty headache [HDAS].|
|Serial 29: Naomi, a heavy-duty intellectual, was practically Martha’s guru.|
|Auf Wiedersehen Pet Two 86: I mean, we’re talkin’ about a heavy-duty villain here.|
|Trainspotting 64: This is a heavy-duty line-up for a fuckin porter’s job.|
|Indep. Rev. 13 Jan. 1: He’s a heavy-duty Rasta.|
2. (US) tough, unpleasant.
|Blood Brothers 115: Jamaica’s a very heavy-duty place, very poor.|
|Brown’s Requiem 171: Heavy-duty shit.|
|Iced 148: I was busy orchestrating a deal with Dalek [...] when the heavy duty shit butchered the fan.|
|www.asstr.org [Internet] The other thing that everybody knew was that he was dead apple fritter about how Dionne had treated him and wanted to cause her some really heavy duty omar sharif.‘Dead Beard’ at|
|Life 229: Yet you know they’re carrying weight, they can bring down some heavy-duty shit.|
3. (US) terrific, first-rate.
|(con. 1920s–30s) Youngblood (1956) 415: There was a beautiful rhythm in the way she walked. [...] ‘She truly built for speed – ain’t she Youngblood? And heavy duty!’.|
|After Hours 8: Carlos Brigante was heavy duty.|
|Another Day in Paradise 134: Not only is this guy a world-class athlete, but a heavy-duty celebrity as well.|
4. (US) deeply committed, heavily involved.
|What’s the Good Word? 5: Eric Heiden is a heavy-duty skater.|
5. (US drugs) strongly addictive.
|Hospital 36: I never did heavy-duty drugs.|
6. (US) fat, overweight.
|Guardian 30 Dec. 90/2: Tim [...] calls Jennifer names to try and shame her into dieting [...] ‘Fat Pig,’ ‘Linebacker,’ ‘Heavy duty’.|