diplomat, diplomatist - an official engaged in international negotiations

human, individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"

disagreeable person, unpleasant person - a person who is not pleasant or agreeable

ingrate, thankless wretch, ungrateful person - a person who shows no gratitude

interloper, intruder, trespasser - someone who intrudes on the privacy or property of another without permission

meddler - an officious annoying person who interferes with others

disreputable person - someone lacking public esteem

gloomy Gus, picklepuss, pouter, sourpuss - someone with a habitually sullen or gloomy expression

killjoy, party pooper, spoilsport, wet blanket - someone who spoils the pleasure of others

annoyer, tease, vexer, teaser - someone given to teasing (as by mocking or stirring curiosity)

bad hat, mischief-maker, trouble maker, troublemaker, troubler - someone who deliberately stirs up trouble

undesirable - one whose presence is undesirable; "rounding up vagrants and drunks and other undesirables"

scoundrel, villain - a wicked or evil person; someone who does evil deliberately