I, once upon a time in my foolish, foolish youth, liked Mountain Dew. Then my parents made me take cough syrup. But they made it easier for me to take, the first time I ever took it. How? Putting it in Mountain Dew was their best idea.
Yeah. I vomited the stuff straight up. Never had Mountain Dew since.
We used to eat at this little Thai place…until one time a year ago when they spiced my Pad Thai noodles way more than usual… I’ve since discovered that I have an intolerance for ginger, garlic, and red peppers. Which sucks 'cuz I love all three of them.
I happen to like Thousand Island dressing but have an aversion to mayonnaise and mayonnaise-based condiments. That first whiff of the Thousand Island when I get my salad really turns my stomach. I make myself eat and then I don’t notice the smell anymore.
I didn’t puke Mountain Dew, but I’ve had it puke on me. I was changing the soda lines at a fast food place I managed when I was in high school. I could never remember if I was supposed to hook the gas up before or after I hooked the syrup up - I still can’t remember, but whatever way it was supposed to be, I did it the other way. Mountain Dew syrup all over me, the floor, the ceiling, and three laughing-like-hyenas co-workers. I can’t even tolerate the smell anymore.
When I was pregnant, everything made me sick. The worst, though, was taking a glucose tolerance test when I had to drink a thick lemon-lime flavored glucose solution. I never liked 7up anyway, and this was like straight 7up syrup. THAT time, I puked, and now the smell of lemon-lime anything will send me running for the nearest commode.
Any Franco American brand pasta product. I chucked some as a kid and even to this day the smell makes me sick.
One of my all time favorite snacks are Lil Smokies, those small cocktail type weenies. I got violenty ill one night after eating some for dinner and can’t go near them since.
You mean if you eat something, then throw it up, you no longer like that food?? To me that is so odd! I don’t get that at all. But then, I quite enoy throwing up.
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Throwing up recipe:
Take 1 pint soda/cider/lager. Down it.
Take 1 pack of Refreshers. Munch them all down at once.
Proceed to vomit in multicolour bubbles!!
Hence username?
Bourbon and Coke. I was a very young co-ed at a fraternity party, 1961. Excuse me, I feel a little sweaty and have to go lie down now.
Flavored popcorn from a particular store. A stored opened up in our college town, selling a bajillion varieties of different flavors, and we love some practically every day for a month. Then I got the flu. Felt queasy all day, didn’t eat any popcorn. Felt better the next day. Saw the popcorn bag, thought it would taste good, ate it, and an hour or so later the flu came back. Totally unrelated to the popcorn, I’m sure, and I never actually got a “second look” at the stuff but I was never able to eat it again. Oddly enough, the store went out of business about 2 months later… I have to assume we’d been propping up their sales single-handedly (well, double-fistedly!) 
A few years after that, I worked in an office building with a nice Thai restaurant on the ground floor. Loved their stuff. Then I got pg. Tried to eat lunch there once after getting pregnant. Got halfway through my meal and decided I’d Best Not Continue. Can’t stomach the stuff now (and it’s been 7 years). Bummer. 
Cole slaw. Ate some at a drive-in joint and threw it up all over my parents’ car. Have not touched it since (30+ years). I used to enjoy Rubio’s fish tacos, but when I noticed that they contained shredded cabbage and a vaguely slaw-like dressing, I had to stop eating them.
I also threw up some ramen noodles a long, long time ago and for many years wouldn’t eat them, but eventually got over it. Not that they’re my favorite or anything.
Barfed after eating pot roast one night. For some reason, I sensed that the roasted carrot was the culprit, and I avoided them for years. I don’t know why I put the blame on the carrot.