The phrase "laughed head off" is a hyperbolic expression used to convey extreme laughter or amusement. However, there are alternative ways to describe such a reaction. For instance, one can say they "burst out laughing," "cracked up," "chuckled uncontrollably," "howled with laughter," or simply "lost it." Other synonyms include "roared," "guffawed," "belly laughed," and "fell apart." Each of these expressions alludes to a different aspect of laughter, from its forcefulness to its duration. Regardless of the phrasing, all of these words convey a sense of unrestrained hilarity.