belly laugh

from WordNet (r) 3.0 (2006)

belly laugh
    n 1: a burst of deep loud hearty laughter [syn: {guffaw}, {belly
         laugh}]
    2: a joke that seems extremely funny [syn: {belly laugh},
       {sidesplitter}, {howler}, {thigh-slapper}, {scream}, {wow},
       {riot}]

from The Collaborative International Dictionary of English v.0.48

belly laugh \bel"ly laugh`\, n.
   a vigorous, loud laugh, expressing a strong amusement.
   [WordNet 1.5]