たまったものではない

Also written 堪ったものではない

Meanings

1. Expression intolerable; unbearable; unendurable (emphatic form of 堪らない) See also: たまらない.
2. tremendous; out of this world; irresistible See also: たまらない.
3. cannot help (doing); cannot but do; anxious to do See also: たまらない.

Jinuma: Japanese Dictionary · Word lists