Definitions
1.NounOne who hums.
2.NounA Humvee.
3.NounA type of vehicle resembling a jeep but bulkier."The newlyweds took a hummer limo back to their casino resort."
4.NounA hummingbird.
5.NounA humdinger; something or someone exceptional or outstanding of their type.
6.NounA machine that runs particularly well and smoothly.
7.NounA very energetic or lively person; a powerful lively thing.
8.NounA place, event etc. that is bustling or full of activity. .mw-parser-output .defdate{font-size:smaller}
9.NounSomething that generates a lot of attention, talk, and excitement.
10.NounA fastball.
11.NounFellatio, especially when the person performing the act vibrates their mouth by humming.
12.NounSomeone who upsets or irritates others; a trouble-maker or controversial figure.
13.NounThe condition of having no money.
14.NounAn admirer.
15.NounA tantrum or fuss.
16.NounA lie or tall tale.
17.NounA liar.
18.NounSomething that smells very bad.
19.NounAn arrest on false pretexts.
20.InterjectionA euphemism for the devil or the infernal regions