Weird out
Definition 1 of 1
Pro Tip 1/3Emotional Reaction
Use 'weird out' to describe feeling uneasy due to something unusual or unexpected. 
Clowns at the party started to weird me out.
Pro Tip 2/3Colloquial Usage
'Weird out' is informal and best used in casual conversations, not formal situations. 
I got weirded out by his intense stare during our casual meet-up.
Pro Tip 3/3Not Always Negative
Although often used for negative situations, 'weird out' can express a neutral or slight discomfort. 
That new art exhibit weirded me out, but it was intriguing.