The Pilot:
Chandler: ( On Monica's new boyfriend) So does he have a hump, a hump and a hair piece?
T.O.W. The Sonogram at the End:
On Rachel's lost engagment ring.
JOEY: Alright, when'd'ya have it on last?
PHOEBE: Doy! Probably right before she lost it!
CHANDLER: You don't get a lot of 'doy' these days...