The term 'give a thumbs down to' can be expressed in three different ways using crossword solutions. The first solution is 'VETO', which is a four letter word. This term comes from the Latin phrase 'VETO' meaning 'I forbid'. It is used to describe the power of a person or group to reject a decision or proposal made by another. The second solution is 'PAN', which is a three letter word. This term is derived from the Greek word 'PAN' meaning 'all'. It is used to describe a negative opinion or review of something. The third solution is 'NIX', which is also a three letter word. This term is derived from the German word 'NIX' meaning 'NOTHING'. It is used to express disapproval or rejection of something.