Mr Nasty strain guide
Mr Nasty is an indica-leaning hybrid that crosses GMO with Grease Monkey. The name is a fair warning about the smell: people describe it as loud and savoury, with garlic, skunk and gas. It's also known for very high THC numbers, so it's not a gentle strain.
Where does Mr Nasty come from?
Two strain databases agree on the cross: GMO, the garlicky strain also sold as GMO Cookies, with Grease Monkey, a sticky Gorilla Glue and Cookies and Cream cross. One strain database also lists the nickname Greasy Garlic, which sums up both parents pretty well.
Who bred it is less settled. One strain database credits Exotic Genetix, while some retail listings name a Colorado grower instead. With no breeder statement to settle it, we'd call the breeder not well documented. Another database describes it as roughly 70% indica.
What does Mr Nasty smell and taste like?
Most people notice the funk before anything else. Descriptions pile up words like pungent, skunky, garlicky and gassy, with an earthy, peppery side and a little sour citrus. Some reviewers say the exhale turns softer and a touch sweet, and one listing on one strain database goes as far as tar and ammonia.
Caryophyllene is the terpene most often listed first, followed by limonene and myrcene. Caryophyllene fits the peppery bite, limonene the citrus edge and myrcene the earthy base. A few reviewers mention it can be harsh on the throat.
Mr Nasty effects: what people report
People most often describe Mr Nasty as euphoric and relaxed, sometimes giggly. Several reports talk about an upbeat, creative start that slides into a heavier body feel, though not everyone ends up sleepy. One strain database sums up its reviews as mostly calming.
These are experiences people report, not promises. How it feels depends on the product, how much you have and your own tolerance. Dry mouth is the most common complaint, and some people mention feeling anxious or paranoid, which isn't surprising at this strength.
How strong is Mr Nasty?
Very. One strain database lists it around 27% THC, another database gives 26% to 30%, and some producer listings show batches from 28% up to 32%. CBD is very low.
If you're new to it, start with a small amount and give it time before having more. The THC and CBD numbers for your batch are on the label, and our guide to reading cannabis labels explains what they mean.
Buying Mr Nasty in Canada
Producers sometimes put the genetics right on the package, often as GMO x Grease Monkey, which makes it easy to confirm you have the real cross. If the label only says Mr Nasty, check the THC number, since batches range widely.
You're most likely to see it as dried flower, though it also turns up in concentrates. Look at the packaging date too, because fresher flower holds more of that pungent smell.
Mr Nasty vs Grease Monkey
Grease Monkey is one of Mr Nasty's parents, and both are heavy, resinous hybrids with high THC. The difference is in the jar. Grease Monkey smells of diesel, skunk and a little sweet vanilla from its Cookies and Cream side, while Mr Nasty adds GMO's garlic and savoury funk on top. Mr Nasty also tends to list a few points higher in THC. If you want gas without the garlic, Grease Monkey is the easier pick. If savoury strains are your thing, go for Mr Nasty.
Strains like Mr Nasty
If you like Mr Nasty, these are the closest matches:
- GMO: one of its parents, and the source of that famous garlic and onion funk.
- Grease Monkey: the other parent, with diesel, skunk and a sweet vanilla edge.
- Garlic Breath: another GMO cross with the same savoury, peppery smell.
- Slapz: a Grease Monkey cross that keeps the gas and skunk with a brighter lemon top.







