ice doctor
a person who is good a kepping it real or cool. he can turn any tight or heated situation into a cool and calm one. also someone who takes everything in stride, when a normal person might freak out or panic.
"Dude Bruce is such an Ice Doctor, we gave him the five cereals and he didnt even flinch, he just named five cereals."
"Really? that guy is always cool and collected.'
"Really? that guy is always cool and collected.'