Yuh or Yes. Y'uhm? Is used when you fake agree with someone else's opinion just to look cool. Y'uhm is also used when you don't totally agree with someone's opinion.
Y'uhm?: Uhhh yuh?/Uhhh yea?/Uhhhh yup?
1: This TikTok trend is soooo cringy
2: Y'uhm?...
1: His green eyes are soooo gorgeous!
2: Y'uhm?..
IN MIND: I don't think so... i like blue eyes...