throw a party
To hold or host a special social gathering in celebration of someone or something. We're throwing a party for Bill's retirement next week. My parents warned us not to throw a party while they're gone.
throw a party (for someone)
Fig. to have a party; to hold a party; to arrange a party. Bill threw a party for his sister before she went away to college. Things seem sort of dull. Let's throw a party.
throw a party
Put on or hold a social gathering, as in They're throwing a party to introduce their nephew to the neighbors, or She threw a party every Saturday night. [Colloquial; first half of 1900s]