This is not Squick, even though they are related. Nausea Fuel are scenes and events that are specifically meant to be disgusting. While Squick only makes some people go "ew, gross" and is extremely subjective, Nausea Fuel is created (and is often considered by everyone) to be sickening and horrifying. For example, someone getting punched in the face and bleeding profusely is Squick. That same head getting crushed, graphically, is Nausea Fuel. When there's no gore involved, this trope is most commonly invoked by motion sickness or anything involving bodily functions.
Paradoxically (or maybe not), Glurge can also find itself in this category.
Also related to Shock Site and Gross-Out Show. Eye Scream and Gross-Up Close-Up are subtropes of this. Frequently overlaps with Fan Disservice, Gorn, and Nightmare Fuel.
Nausea Fuel has been suggested to play 1 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.