flag up(redirected from flagging him up)
To mark or highlight someone or something for the attention of others. A noun or pronoun can be used between "flag" and "up." The council was right to flag up these inconsistencies in the administration's report. Something in my Internet search history must have flagged me up to the authorities.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.