you/he/she must be joking

: the one or ones being addressed — compare thee, thou, ye, your, yours

: one

: that male one who is neither speaker nor hearer — compare him, his, it, she, they

used in a generic sense or when the sex of the person is unspecified

: a male person or animal

: one that is strongly masculine or has strong masculine appeal

: the 5th letter of the Hebrew alphabet — see Alphabet Table

helium

: that female one who is neither speaker nor hearer — compare he, her, hers, it, they

used to refer to one regarded as feminine (as by personification)

used as an alternative to he to refer to a person of unspecified gender

: a female person or animal

: she or he

: be commanded or requested to

: be urged to : ought by all means to

: be compelled by physical necessity to : be required by immediate or future need or purpose to

: an imperative need or duty : requirement

: an indispensable item : essential

: the expressed juice of fruit and especially grapes before and during fermentation

: musk

: mold, mustiness

: something said or done to provoke laughter

: the humorous or ridiculous element in something

: an instance of jesting : kidding

: to make jokes : jest

: to make the object of a joke : kid