Trelf is an expression Brook is trying to popularise which is yet to become standard vernacular to my knowledge.
For the record I dislike it since spoken patterns including the word 'trelf' preceded or followed by 'self' don't roll off the tongue and for most purposes it is safe to assume a triple is a self thrown rather than a passed triple anyway.
Agree on heff comments
by jamesfrancis, in response to this post 2015-12-15 23:13:20