Chou Collection, Upper Volume
Radical: Mouth (kǒu)
Character: You
Kangxi stroke count: 9
Page 189, Entry 10
Broad Rhymes (Guangyun): Pronounced you (entering tone), same as the sound of you (entering tone).
Jade Chapters (Yupian): Means to vomit.
Broad Rhymes (Guangyun): Refers to the sound of vomiting.
Also, Collection Rhymes (Jiyun): Pronounced yi, same as the sound of yu. Meaning is the same.