I've only ever heard the term once, and it was as described in Fruit punch. No authority here, but one sample anyway. On Thu, Aug 23, 2012 at 8:04 AM, David Millstone <David.Millstone(a)valley.net> wrote:

David and All: Thanks for sharing A Quarter More, as I was not aware it was the dance that introduced the yearn. I thought both slice and yearn referred to the same single progression move, and it was a matter of regional taste as to which was used. I did not invent the term slice, and do not know who did. But I like the move and use it in my dances a fair amount. It is an easy and efficient progression in 8 beats, which means there's plenty of time for other ideas. And yes, Lisa, it has worked in medleys when I know the audience well - even if dancers don't know it, they can easily fake it/figure it out on the fly. So back in 2006 when a bunch of us wrote Slice of Pinewoods, we thought we were creating a new move, the double slice, but really were just rediscovering George Walker's yearn. Even so, I prefer the terms slice and double slice, as they indicate the number of progressions (in addition to the yearn/urine issue). It's also been my experience the double slice is better in long lines rather than going two by two - more connectedness means less possible confusion over which couple to finish across from. BTW, there's another variant here: Half a Slice Becket-L / BI A1. 8 Half a slice L to a line/4 (1) 8 Down hall in line/4 – turn alone A2. 8 Up hall and bend line 8 Ladies allemande L 1½ B1. 4,12 Neighbor balance, swing B2. 6 Circle L ¾ 10 Partner swing – face on L diagonal (1) – As in a normal slice, go forward towards each other on the L diagonal. But here the top two dancers (1L and 2G) keep hands joined and the bottom two push off (1G’s L hand and 2L’s R hand) so all face down. This is an efficient way to get everyone progressed and facing down in 8 beats, so there is time for creative or dramatic push-offs. Bob