DAP-energy is a term to describe behavior that women don't find attractive or even repulsive and is derived from the acronym DAP (dry-ass pussy). Behavior with strong DAP-energy can lead to the disappearance of a woman's interest even though it was originally high.
The behavior can be systematic or consist of slip-ups on singular occasions.
An example of systematic DAP-energy behavior could be still living with one’s parents over the appropriate age or a long-term refusal of performing oral sex on women.
However, DAP-energy is a subjective variable and might not mean the same for every woman.
DAP-energy on a single occasion:
Guy 1: Look at Jasper making goofy noises while trying to pick up this chick.
Guy 2: With that kind of DAP-energy behavior he will never get laid…
Systematic DAP-energy behavior:
Girl 1: I really liked him until I found out his mom still lays his clothes out…
Girl 2: Ew I get that, such DAP-energy.