Usually refers to a huge bitch with no neck. She's so fat that her body meets her chin which leaves no room for her neck. These types of HUGE bitches can be found within a group of hot chicks ready to Cockblock anytime anywhere. Be aware of Landmines, they're extremely dangerous.
ps. When Landmines turn around, head turn = body turning as well due to lack of neck.
Yo look at that hot piece of ass!!
"Where? I can't see shit, Landmine is blocking her"
"I'm outta here bro, this place is filled with Landmines"