To say after something good happens and before you do the 'dab' dance move

Australian slang for dad.. also dabo

Evidence that humanity can evolve backwards

Dabbing (1) - Vaporizing concentrated marijuana, usually in the form of wax or hash, by placing it on an extremely hot metal object called a nail and inhaling the vapors produced. The nail is usually heated via blowtorch. Inhaling this harsh and concentrated form of marijuana often causes one to cry and wipe one's tears away while coughing and passing a bong.

Dabbing (2) - Performing the dance move characterized by raising an elbow and tucking one's head toward that elbow while raising and extending the opposite arm behind. This dance move is often seen while dabbing (1) since the dabber immediately coughs into his inner arm and wipes his or her tears away while passing a bong. See attached .gif image.

completely dead

An internet trend where you sniff your armpit and think it's cool.

A "dab" is when a cyclist touches the ground with his or her foot, shoe, etc. It is avoided in many disciplines such as mountain biking and trials riding.