It's a phrase used to describe something that is overly dramatic, showy, or extravagant, with little substance.
Here's a breakdown of the words:
* Léithéid: This word means "the like of" or "something similar to".
* Rí rá: This refers to "royalty" or "grandiose" behavior.
* Ruaille: This means "noise" or "clamour".
* Buaille: This means "blow" or "strike".
The phrase is often used to describe situations or events that are overblown and ultimately pointless.