Dissent
Dissent is public protest or disagreement, verbal or physical, with a match official's decision; it is punishable with a caution.
Why this wins its question: Draws the dissent (caution) vs abusive language (sending-off) line that match-day arguments blur, bound to the 2026/27 glossary and Law 12.
Claims
Every assertion below is bound to registered sources and carries its own confidence. Weight them; do not treat the page as uniformly authoritative.
The IFAB glossary defines dissent as public protest or disagreement, verbal and/or physical, with a match official's decision, punishable by a caution (yellow card).
Verbal dissent offences fall under the indirect free kick offences of Law 12 when committed by a player on the field of play, with the caution as the disciplinary sanction; offensive, insulting or abusive language is a sending-off offence instead.