a strong suggestion to avoid a person at all costs.
Behind Susie's back Wilkie formed the two-fingered x sign above her head - blackflagging her in no uncertain terms to Jimmy who had approached unsuspectingly with the intention of spading her.
to do something fucked up or wrong. Usually followed by someone waving a small black flag and the words "You done fucked up, son"
Tynise black flagged when she texted the wrong person. Twice.
Getting really wasted and fucking up all night long usually with a big group of friends.
Mark was chugging four locos when he got up and shoved Christian hard on the toilet.He was so black flagged.
To have poisoned insects or critters. Derived from a trademark named insecticide.
Yolanda blackflagged her crabs with lindane.