When leaving a chair, you can say "I call seatback" and no one else in the room can take the seat away from you. Similar to saying, "I call shotgun" when approaching a car.
by Jamie Kozma March 11, 2006
by Jason you dumbass November 20, 2005
when leaving a seat calling seatbacks before someone else sits in it gets you your seat back upon returning. If you sit somewhere else, or go outside than seatbacks is nullified.
by lesteveman September 05, 2006
The action of accidentally leaving something behind on an airplane, most notably in the seatback storage area in front on you.
by johntex December 08, 2004