Net-Bestie. Best Friend. A beautiful person inside and out. Someone that you want to see every day for the rest of your life (even if they are far away).
To mimic a pincher of a crab then firmly grasp another male's genitals unexpectedly.
Johnny ran up to the other male student, and firmly grasped his hand on the genitals resulting in the student being shocked that he received a crab nest.
A beautiful woman with a goddess-like aura. A nessma generally has long dark hair, enticing eyes, and does not need to strive towards perfection because her humility, intellect, and grace make her perfect.