しりつぼみ【尻窄み】 1 〈容器などについて〉 句例 尻つぼみになる narrow toward the end; taper (off). 2 〈竜頭蛇尾〉 =りゅうとうだび 句例 尻つぼみになる end (up) in an anticlimax; peter out; fizzle out. New College Japanese-English Dictionary, 4th edition (C) Kenkyusha Ltd. 1933,1995,1998
りゅうとうだび【竜頭蛇尾】 a bright beginning and a dull [tame] ending; an anticlimax 句例 竜頭蛇尾に終わる end (up) in an anticlimax. 文例 彼の講演は竜頭蛇尾の感じを与えた. Our impression is that his lecture started promisingly but ended in an anticlimax. New College Japanese-English Dictionary, 4th edition (C) Kenkyusha Ltd. 1933,1995,1998