When someone is vomiting, holding onto the bowl of the toilet/bowl/alley gutter, they take a quick breath. They look up at their friend or partner and try to smile, drool and gunk still very much on their face.

2)Nickname given to someone with a high preponderance to throwing up, normally due to inability to drink at the same level as their friends.
"Why is she coming out tonight? SHe's such a Pukey Mcvomityface
by OldDirtyRabbi December 26, 2011
Get the Pukey McVomityface mug.