What is Reaction Face?
1.
of, pertaining to, marked by facial reaction caused by consumption of something a consumer finds distasteful. It is completely reactionary and cannot be simulated effectively.
Example 1:
Andre: My favorite drink is Vodka and Red Bull.
Steve: Vodka is nasty, I can't even drink it without getting reaction face.
Example 2:
"Jorge is such a douche, watch how he gets reaction face every time he takes a shot."
See