Meaning of "Lost my lunch"

[Farzana]

English Language Tests, Intermediate level

ESL/EFL Test #392 "English Slang Idioms (126)", question 2

"I went to see the new horror movie with my boyfriend this weekend. It was so gory I almost lost my .......... I felt sick to my stomach for a good while after the film ended," Sally said to May.

(a) incentive
(b) motivation
(c) lunch
(d) sleepiness

English Language Tests, Intermediate level

ESL/EFL Test #392 "English Slang Idioms (126)", answer 2

"I went to see the new horror movie with my boyfriend this weekend. It was so gory I almost lost my lunch. I felt sick to my stomach for a good while after the film ended," Sally said to May.

Correct answer: (c) lunch

Your answer was: incorrect
"I went to see the new horror movie with my boyfriend this weekend. It was so gory I almost lost my sleepiness. I felt sick to my stomach for a good while after the film ended," Sally said to May.
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please explain it

[Linda]

Hello,
Lost my lunch refers to something that makes you sick to your stomach - something that is gross or disgusting. It literally means that it made you sick (throw up, vomit etc.)
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[Farzana]

Thanks Linda I'm grateful to you.
Farzana