foolish
humorous
humourous
undignified
a bit thick
a bit thin
absurd
amusing
antic
barred
beyond belief
bizarre
closed-out
cockamamie
comic
comical
contrary to reason
crazy
doubtable
doubtful
droll
dubious
dubitable
eccentric
excluded
extravagant
fantastic
farcical
frivolous
funny
goofy
grotesque
hard of belief
hard to believe
high-flown
hilarious
hopeless
implausible
impossible
improper
inane
inconceivable
incongruous
incredible
indecent
indelicate
insane
deride
derision
ridicule
ridiculosity
ridiculously
amuse
childish
false
ludicrous
meticulous
serious
solemn
somber
straightforward