Fizzenless means: A Scottish dialect word meaning without energy, force, or vitality - listless, lethargic, or feeble. Something fizzenless has lost its fizz, its spark, its get-up-and-go. It can describe a person. It is a dialectal or regional word and rarely appears in mainstream teen culture; usage usually points to a family, regional, or literary source rather than peer slang. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on.