What is an odd meter riff?

An odd meter riff is a musical phrase or motif that is structured in a time signature that does not conform to the common duple (2/4, 4/4) or triple (3/4, 6/8) meters. Instead, it often features irregular or asymmetrical patterns, such as 5/4, 7/8, or 11/8, which can create a unique rhythmic feel. These riffs are commonly found in progressive rock, jazz, and world music, adding complexity and intrigue to the composition. They can challenge both musicians and listeners by defying traditional rhythmic expectations.