"beaten as addle as an egg"
Metaphor
Act 3,
Scene 1
Lines 22-23
Mercutio
In Mercutio's metaphor Benvolio's head full of quarrels is likened to an egg full of yolk. Eggs are beaten, or "addled" (in preparation for cooking) and Benvolio's head gets beaten, or scrambled, when he fights in a quarrel, like an "addled" egg.