Threat, typically by a spouse, to withhold a meal or favorite dish in order to ensure cooperation.
Wife uses foodmail to stop husband from being annoying by threatening to forget how to make husband's favorite food, as in "if you do that again I may forget how to make..."
Wife (sometimes girlfriend and occasionally husband or boyfriend) rolls over in bed, wrapping the covers around them, emulating a roller blind. This neatly removes the covers from the unfortunate husband (or boyfriend, wife or girlfriend).
Husband laments - "My wife rollerblinded the covers last night and my butt was freezing cold when I woke up."