Questions & Answers about Hun drak for meget og brækkede sig hele natten.
Why is sig used after brækkede here? Doesn't at brække mean "to break"?
You're right that at brække usually means "to break" (like breaking a bone). However, when you make it a reflexive verb by adding sig (at brække sig), the meaning changes completely to "to throw up" or "to vomit".
Could I use kastede op instead of brækkede sig in this sentence?
Yes, kastede op (the past tense of at kaste op) is another very common way to say "threw up" in Danish. Brækkede sig is slightly more colloquial and graphic, but they mean the exact same thing here.
Why does "all night" translate to hele natten and not just hele nat?
When expressing "the whole" or "all of the" about a singular thing, Danish uses the adjective hele followed by the noun in its definite form (with the -en or -et ending attached). Since "the night" is natten, "all night" becomes hele natten.
Why do we use for meget instead of for mange for "too much"?
Meget means "much" and is used for uncountable amounts, like the general volume of liquid or alcohol she drank. You would only use for mange ("too many") if you were talking about specific countable items, such as drinking "too many beers" (for mange øl).