(interrogative) Of whom, belonging to whom; which person's or people's. / (relative) Of whom, belonging to whom. / (relative) Of which, belonging to which.

(interrogative) That or those of whom or belonging to whom. / (relative) That or those of whom or belonging to whom.

(rhetorical question, sarcastic) Used in response to someone’s threat suggesting that the person in question cannot do what she or he says alone.

Alternative form of which foot the shoe is on

Who is suffering or losing out in a given situation.

(poetic) whosesoever

(possessive) Of whomever; belonging or related to whatever person or persons; whoever's.

(possessive) That of whomever; that which belongs or is related to whatever person or persons; whoever's.

(proscribed) whoever is.

Of whomsoever.