What does 'in the red' means?

Answer:
it means to be in the red is to be in love.

EDIT: It can also mean 'to be in debt' - In the days of hand-written ledgers in business - negative balances were always written in red ink. Snakester1962 (Supervisor)
First answer by Mariah sue. Last edit by Mariah sue. Contributor trust: 2 Question popularity: 1 [recommend question].