„riff“: noun, 1. a short repeated tune in jazz and rock music; 2. a short piece of speech or writing that develops a particular theme or idea; verb 1. (intransitive) to play or perform riffs in jazz or rock music; 3. (informal) to speak amusingly or make amusing comments or remarks.
„shift“: noun, 1. a slight change in position, direction, or tendency; 2. one of two or more recurring periods in which different groups of workers do the same jobs in relay; verb, 1. move or cause to move from one place to another; 2. change in emphasis, direction, or focus; 3. press the shift key on a typewriter or computer keyboard.