Sick up
Definition 1 of 1
Pro Tip 1/3Informal Usage
Used in casual conversations, often among friends or family, but not in formal settings. 
After the ride, I felt so queasy I thought I was going to sick up.
Pro Tip 2/3UK Slang
'Sick up' is British slang. It's less common in American English, where 'throw up' is more typical. 
She was so nervous about her exam, she was afraid she'd sick up.
Pro Tip 3/3Colloquial Context
Often used to describe vomiting caused by overeating or drinking too much. 
I shouldn't have had that extra piece of cake; I feel like I might sick up.