Cut loose and Whoop it up

Whoop it up and cut loose are semantically related In some cases you can use "Whoop it up" instead a verb phrase "Cut loose".

Whoop it up verb - Celebrate noisily, often indulging in drinking; engage in uproarious festivities.

Cut loose and whoop it up are semantically related in celebrate topic. You can use "Cut loose" instead a verb "Whoop it up", if it concerns topics such as frolic, revel, have fun, tumble playfully.