Typically British slang term used to define "hot" or in other words "drop dead gorgeous"...
She's the fittest girl I've ever seen. 😍😍
by themodernurban March 16, 2019
The Darwinian notion that only those traits best suited to perpetuate the species will endure to be passed along indefinitely from generation to generation while those traits most detrimental to the good of the species will be phased out after a few generations.
This preservation of favourable individual differences and variations, and the destruction of those which are injurious, I have called Natural Selection, or the Survival of the Fittest. - Charles Darwin, Origin of Species
by mta3000 October 17, 2010
When yo playin dodgeball in PE “middle school style

Pe teacher doesn’t see other team cheat
You get shot in the nuts other team goes “LOL LMAOO WHAT A Noob!!!”
“Yo coach they be cheating”
Survival of the Fittest, ya wimp
by Willthrill9 January 8, 2020
When you are at school and your mom hasn’t picked you up yet and you have 5 dollars in your bag for cris
Hey, this feels like Survival of the Fittest.
by Not a Gnelf, but a gnome. January 23, 2019
When you go through your list of fuck buddies and friends with benefits and choose the fittest girls and get rid of all the munters until eventually you're left with the fittest ones.
"I don't know which one I like the most?"
"Go all survival of the fittest on them dude"
by Elach April 8, 2015
A condition where you are in the company of a select group of random people, for instance on the bus. There's a girl that within the general public you may rate 6/10. However as she is the fittest girl on the bus she looks more like a 9/10.
Guy 1 : Woahh, that girl on the bus was stunning!

Guy 2 : C'mon just because she was the fittest girl on the bus doesnt hide the fact she was a complete cheb-a-saurus-rex!
by JF131 March 30, 2013