(Archaic definition) A sudden desire or change of mind, especially one that is unusual or unexplained.
‘He opened the door on a whim, expecting nothing, but instead, he was faced with four sets of eyes.’
‘She did it on a whim when the opportunity presented itself, and she died four days later.’
‘Apparently on a whim, Wonka suddenly decides to reopen his doors to five children.’
by Ciahcra January 12, 2018
A word that does NOT exist.
Grandma" why do you always have to do things on a whim?"

Me "wtf is a 'whim' that cant be a real word."
by Mkay Bud August 24, 2017
Not a person, but a phenomenon. A whim is a public schoolboy with bleached hair. He doesn't follow orthodox slang trails. He chooses to forge his own. Such as spafe, westlife, and uber vince-head.
The Whim drives a 1.1 litre peugeot 106, and has a unique dance technique known only as "The Whim-Bop". Nicknames of The Whim, include the ridiculous: Peter, Whimothy and Whim-Bob.
The Whim is currently the only human to be signposted, and even has a supermarket named after him (in Newquay).
"Who's that sweet legend vincing, uberfast on the dance floor?"
"That'll be The Whim"
by The Waz August 19, 2004
a type of slang used in london ghettos for a blowjob also known as goin down on tha peepee.
Chaps gave me a whim the other night. it was quite scrumptious.
by dat dolla bill boy May 13, 2010
Commonly used on internet forums/bulletins to ask a user to send a private message.
Hey Jim, your mother is hot, can you whim me her number please?
by Famin3 March 13, 2008
A whim session is when you and your friends decide to venture out of town for a drink somewhere new. May cause controversy with some drinking buddies as they’re set in their ways and prefer the same old local drinking establishments.
Trev - “Going for a few drinks at HB at 7. Best get yourself down!”
Alan “Not tonight thanks. Some of us are going for a bit of a whim session and checking out that new bar in Millaston. You’re welcome to join us, Ken’s driving.”
Trev- “You must be joking if you think I’ll be seen in a dump like that! Way too far, just come down to HB.”
by KennethRoberts September 18, 2018