I work in a small team, this guy had recently joined, like a month ago and I love to teach/mentor and my manager sees me enjoying and good at it, the colleague is of my age but he smirks a lot e.g. If I want to confirm something that he ask, he smirks in a taunting way.
I try to ignore it but today we ran into a problem where I had to make quick changes to code to fix a broken image, while I was during the fix quick (for not getting CEO's attention of broken image), my colleague constantly smirked in a taunting way. Which distracted me because after my manager I see things and know in and out
While I was doing the fix, he was constantly smirking and asked me what went wrong, when I told him, he smirked again like a way to say "how foolish of u". Later when I was leaving, he smirked in a way which really really offended me and felt like "ur gonna get fired looser".
In the evening I was so upset that I had an accident today when I bashed my car into another car.
I can tell my manager in 121 but it will like whining. so I want to address it myself but do not know how? I help him countless time for his naive mistake and don't smirk but he is like a silent bully with a smirk.
I have noticed his constant chatting and smirking has affected my work pace.