what does cal mean in the last epi : React to Contact, when he says "shepherds pie" ?

Ok, shepherd's pie is something like a combination of food in a pie or something. I think the analogy he was trying to use was he feels a bunch of different emotions for Gillian = the 4th of July because it's all lit up with different emotions. If you go to lietomescoop.com and look up the article 'What did you think of "React to Contact?"' these people were discussing it. I hope that helps!