Blue
Ravenous Bugblatter Beast of Traal
On page 59 of the basic rules, there is a variant rule: "Variant: Skills with Different Abilities" that talks about doing skill checks with non-standard abilities where appropriate and gives the example of making a Constitution (Athletics) check applying proficiency bonus if applicable for making a long swim.
Is this an example of uncoupled skills?
Exactly. It was around in some of the playtests and then Athletics became Strength only. I like that variant rule - it just gives the players the chance to be creative. Pretending to be a juggler and making a Dex (Performance) skill, etc.