Standard word for one's own son or someone else's son. Neutral and widely used.
My son will graduate from university this year.
Her son is very polite.
Colloquial and somewhat vulgar slang. Used mainly among men in casual contexts.
That joke was crude, full of penis talk.
She raised her son by herself.
Last year, our son was born.
My father intends to have my son take over the shop.
young man inexperienced with women; male virgin
stepson