hummer

1 an ambitious person who eagerly goes after what is desired he's a real hummer when it comes to getting new clients for his advertising agency Synonyms bootstrapper, go-ahead, highflier (or highflyer), go-getter, hustler, live wire, powerhouse, rustler, self-starterRelated Words eager beaver; achiever, comer, doer, enterpriser; he-man, individualistNear Antonyms dawdler, idler, loafer, lounger, putterer, trifler; goldbrick, malingerer, procrastinator, shirker, slacker; drone, lazybones, sluggard; dallier, laggard, lingerer, loiterer, slowpoke, stick-in-the-mud; ignorer, ne'er-do-well, neglecter; daydreamer, dreamer; dropout, quitter

2 something very good of its kind this is the author's first mystery novel, and it's a hummer Synonyms beaut, beauty, bee's knees, cat's meow, corker, crackerjack (also crackajack), daisy, dandy, dilly, doozy (or doozie also doozer), dream, honey, hot stuff, humdinger, jim-dandy, knockout, lollapalooza, lulu [slang], nifty, peach, pip, pippin, ripper, ripsnorter, snorter, sockdolager (or sockdologer), standout, sweetheartRelated Words marvel, phenomenon, prodigy, sensation, wonder; catch, crown jewel, diamond, gem, imperial, jewel, pearl, plum, treasureNear Antonyms bust, disappointment, dud, failure, flop, lemon, letdown, loser, stinker, turkey