[Origin uncertain; ? from TOSH v.2] A small fishing smack.

1

1885.  Daily Tel., 26 Nov. (Farmer). A tosher is not a long-shore driver, though both little vessels are employed in catching what they can close into the land.

2

1911.  Daily News, 10 Oct., 4. Time after time her stout-hearted skipper thrashed the smaller craft (she is but a ‘tosher’ of 23 tons, carrying only three hands), to windward.

3