Cold fish and Unpleasant person

Cold fish noun - An aloof unemotional person.

Unpleasant person and cold fish are semantically related. In some cases you can use "Unpleasant person" instead a noun phrase "Cold fish".

Unpleasant person noun - A person who is not pleasant or agreeable.

Cold fish and unpleasant person are semantically related. Sometimes you can replace phrase "Cold fish" with "Unpleasant person", this phrases are similar.