ridiculous

As adjectives the difference between ridiculous and improbable

is that ridiculous is deserving of ridicule; foolish; absurd while improbable is not likely to be true.

As adjectives the difference between ridiculous and false

is that ridiculous is deserving of ridicule; foolish; absurd while false is (label) one of two states of a boolean variable; logic.

As an adjective ridiculous

is deserving of ridicule; foolish; absurd.

As a noun idiot is

(slang|derogatory) a proponent of intelligent design.

As an adjective ridiculous

is deserving of ridicule; foolish; absurd.

As a noun anger is

remorse, regret.

As adjectives the difference between ridiculous and undefined

is that ridiculous is deserving of ridicule; foolish; absurd while undefined is lacking a definition or value.

As adjectives the difference between malicious and ridiculous

is that malicious is of, pertaining to, or as a result of malice or spite while ridiculous is deserving of ridicule; foolish; absurd.

As a noun crab

is a crustacean of the infraorder brachyura, having five pairs of legs, the foremost of which are in the form of claws, and a carapace or crab can be the crab apple or wild apple or crab can be the tree species , native of south america or crab can be short for carabiner.

As a verb crab

is to fish for crabs or crab can be (obsolete) to irritate, make surly or sour.

As an adjective ridiculous is

deserving of ridicule; foolish; absurd.