I have been playing Poker Night at the Inventory for some six hours now, and I cannot figure out how to get the Slow Play achievement. The description, "Check a pat hand" is vague to say the least. I've looked into pat hands but can't find any true definition in relation to Texas hold'em. Also, how iron-clad is the "check" part of that statement. Would calling another player's bet count, or not? All-in-all, some real rules around this achievement would be great, not hearsay.
Update from 10/15/2014 play
I was playing last night with pocket 9 and K of hearts. I called. On the flop a 3, 4, and J of hearts was dealt. Max bet $2,300 or so and I called. No achievement.