laughing academy (noun) loony bin: mental institution
Sinonime: abating, declining, depreciating, diminishing, dropping, dwindling, dying down, ebbing, ebbing, fading away, lightening, losing momentum, lowering, moderating, narrowing, plummeting, plunging, quieting, sagging, shrinking, shriveling up, sinking, slackening, slowing, slumping, softening, subsiding, waning, wasting, weakening, wearing down, wearing off