In lang=en terms the difference between brain and bum
is that
brain is to conceive in the mind; to understand while
bum is to make a murmuring or humming sound.
As nouns the difference between brain and bum
is that
brain is the control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action while
bum is the buttocks or
bum can be (north america|colloquial) a hobo; a homeless person, usually a man or
bum can be (dated) a humming noise or
bum can be (obsolete) a bumbailiff.
As verbs the difference between brain and bum
is that
brain is to dash out the brains of; to kill by smashing the skull while
bum is (uk|transitive|colloquial) to sodomize; to engage in anal sex or
bum can be (colloquial) to ask someone to give one (something) for free; to beg for something or
bum can be to depress; to make unhappy or
bum can be to make a murmuring or humming sound.
As an interjection bum is
(
label) an expression of annoyance.
As an adjective bum is
of poor quality or highly undesirable .