fat is in the fire, the

the fat is in the fire

Problems are about to begin. Just so you know, Mom found out you lied to her. The fat is in the fire now, huh?
See also: fat, fire

fat is in the fire, the

A course of action with inevitable bad consequences has begun; there's trouble ahead. For example, Now the fat's in the fire-the boss arrived early and will see we haven't even started work . This expression, with its allusion to fat dropping into a fire and causing a burst of flames, was already a proverb in John Heywood's 1546 collection.
See also: fat