the tag in the collar of a shirt when it is exposed above the collar. common courtesy requires one who sees a tagflag to inform the wearer of the shirt with said tagflag.
man one: Hey man you have a tagflag.
man two: Thanks man. this tag always sticks up.
mom: Son you have a tagflag.
son: thanks mother. Would you please cut the tag out of my shirt? it is itchy.
Tajelly is light, sparkle, effulgence or radiance of beauty. It also means pride and honor. When Prophet Moses wanted to see God, He showed Moses his Tajelly (a ray of Light or Noor). Prophet Moses fainted on seeing that and the mountain on which he was standing was crushed into powder.