(transitive, informal) to bust, to catch red-handed, to catch with one's hand in the cookie jar

(figuratively) to have more than one trick up one's sleeve, to have more than one string to one's bow

can of worms, tar baby, snarl

(intransitive, informal, figuratively) to get something off one's chest, to pour one's heart out

sabre-toothed tiger

(transitive, informal) to tar with the same brush, to paint with the same brush

(informal) in the bag (virtually assured of success)

(informal) a fleabag (an unkempt mammal, especially a dog)

(figuratively) to sleep like a log

amniotic sac