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3.
Verb: The act of tagging people in photos, whether the appear in them or not, in order to get their attention.
Dude, she tagflagged me so many times, i have like 30 notifications.
by IHateThemAll September 17, 2011
 
1.
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.
by ryan yoder December 30, 2007
 
2.
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?
by ryan yoder December 30, 2007