Stands for "Freak Out Syndrome"
(fos, fosing, fossed, foser)
1) noun: The instance in which someone has a crush on someone else but denies it, convincing themself that they don't actually like them.
2) verb (to fos, fos out): Any act of running away from a potential relationship or fling with another, for no apparent reason.
3) verb (to fos): When someone makes a move on you and you completely freeze up and aren't sure why. Side effects may include the feeling of flushed skin, increased heart-rate and utter nervousness.
4) noun: Something that ruins love lives.
Alternative spelling: 'foz'
"He grabbed her chin romantically and tried to kiss her, but she fosed majorly and couldn't move."
"He was the perfect guy, but she didn't date him because she had a bad case of
"Don't be a foser! This is a good opportunity!"