dull - not having a sharp edge or point; the knife was too dull to be of any use. sharp - having or made by a thin edge or sharp point; suitable for cutting or piercing; a sharp knife; a pencil with a sharp point.
Herping is the act of searching for amphibians or reptiles. The term, often used by professional and amateur herpetologists, comes from the word herp, which comes from the same Greek root as herpetology, herpet-, meaning creeping.
(Also, the verb associated with derp is herp. It describes the action of coughing a large sticky mass of derp onto the internet in front of you. For example, to use it in a sentence: That twerp just herped a flerp of derp!. A flerp is a unit I made up. It is the amount of derp that can be herped by one twerp.