Of, or pertaining to, a person of quite, calm, meditative, reflecive, or comatose composure; acting as such during all times of the day and night, except when playing music, or after having eaten a truck-load of sugar.
"Rick is being such a Peter Zerkel today! Normally he's louder than the entire band playing Fireworks. Dude. Whoa."
by Elmo August 10, 2004