I took real issue with the “Yo” for two reasons;
# 1 – its “gaas raid” and has no place in the CR
# 2 – for the most part, the CR members are adults (and in many cases parents and grandparents) and while anyone has a right to join in, they should speak in a tone that is the accepted one in the group.
But the biggest irritant is the attitude that is associated with gaas raid. I’m willing to bet he smokes too (and may favorite.. he wears his baseball cap sideways or backwards!)
But seriously, he is in a room full of bnei and bnos torah, and he should speak our language.. not that of the street.