noun
Common loanword for sugar, often used in product names, menus, and casual contexts. The native word 砂糖 is more common in everyday cooking.
See also: 砂糖
コーヒーにシュガーを入れますか？
Do you put sugar in your coffee?
このお菓子はシュガーがたっぷり使われている。
This sweet is made with plenty of sugar.
noun
Internet slang, derogatory. Derived from the similar sound of シュガー and 統合失調症 (schizophrenia), used to mock or insult someone's mental state. Not used in formal or medical contexts.
See also: 糖質
ネットで「シュガー」って書いてあるのを見たけど、あれは統合失調症のスラングらしい。
I saw 'シュガー' written online; apparently it's slang for schizophrenia.