Full context please! ;)
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Joey: I can't believe it's Christmas already. Ya know, I mean, one day you're eatin' turkey, the next thing ya know, your lords are a-leapin' and your geese are a-layin'.
Chandler: Which is why geese are so relaxed this time of year.
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Joey is referring to the popular carol, "The Twelve Days of Christmas", which includes the lines "ten lords a-leaping" and "six geese a-laying". In this case, we assume the geese are laying eggs, but Chandler re-interprets the line as "laying (themselves) down", as if to relax.