I asked what the repercussions were to eating meat.
To willfully eat meat when the authorities of the Church asks us to abstain as a communal penance is a mortal sin of disobedience to the lawful authorities in the Church, who must answer to God for the state of our souls. They have enacted a law for our benefit, and it is our duty to understand the law and follow it to achieve the divine benefits of what it commands and proposes that we might receive in return.
"Remember your prelates who have spoken the word of God to you; whose faith follow ... Obey your prelates, and be subject to them. For they watch as being to render an account of your souls; that they may do this with joy, and not with grief. For this is not expedient for you." (Hebrews 13.7, 17)
Those who will not "hear the Church, let him be to thee as the heathen and publican." (St. Matthew 18.17). The disobedient will be cut-off as performing works of the flesh "enmities, contentions, emulations, wraths, quarrels, dissensions, sects" (Galatians 5.20).