Search Result for "thigh-slapper": 
Wordnet 3.0

NOUN (1)

1. a joke that seems extremely funny;
[syn: belly laugh, sidesplitter, howler, thigh-slapper, scream, wow, riot]



WordNet (r) 3.0 (2006):

thigh-slapper
    n 1: a joke that seems extremely funny [syn: belly laugh,
         sidesplitter, howler, thigh-slapper, scream, wow,
         riot]