Baai no te
Baai no te (場合の手) is a Japanese term for a move that is playable depending on circumstances. The phrase is typically used to describe a move that is not usually considered a joseki move but could be good in certain circumstances, in other words, a special case move.
This example comes from this Japanese site.
is 場合の手. Ba is usual. But Imamura played at because he probably did not want to approach the strong stone, , even by one space.
This example comes from this Japanese site. Kato's attacking play, , is 場合の手.
This example comes from this Japanese site. (dead link)
is 場合の手. Through this is an even exchange.
 From the Japanese word 場合 【ばあい】 (n-adv,n) case; situation; (P) as noted in Jim Breen's WWWJDIC Server