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A name given to someone with a very large penis and who has intercourse with a lot of people.
“Is that onno?”
Fucking hell his dick is huge.”
“I was told he was in a 10 person orgy with him and 9 other girls!”
Onno by Thatwigga April 12, 2020
The boy is doing onno on a pillow.
Onno by Jackiee5 March 1, 2019
Bangla/bengali word for pillow hump.
He is humping his pillow , it is said in Bengali- 'chheleta or balish e onno korchhe!'/ 'ছেলেটা ওর বালিশে ওন্নো করছে!'
Onno by Sonai7 November 5, 2022
A nice heterosexual bloke who can bowl but only when mildly intoxicated with alcohol. Sober or drunk his balls end up in the gutter, but between those is a state of bowling averageness. A strike is a rare phenomenon but when it happens its simply baffling.
Who is that mildly intoxicated average bowler?
It must be an Onno, we'll know for sure when his game drops after another few beers.
Onno by Morddrath February 6, 2010
A Dutch Canadian who plays hockey. He a blond blue haired guy who you think is drunk but is actually sober. From people who just meet him he may seem like a lot to deal with but when you get to know him.. he still a lot to deal with. He is also the life of the party.
Yo is that Onno, man he the life of a party
Onno by The Peguin July 3, 2018

lights on no one's home 

When someone is so fucked up that they're awake, but they're not really there mentally
Alex is so high right now, look at him - lights on no one's home