Peaking is when someone usually a guy, has sex with 5 or more women at once. Once he has finished and came all over them, he promptly blows his brains out all over them because his life will never be any better.
I don't blame Jody for peaking last night, his life was all downhill from there...
The act of getting an erection while wearing jeans that are slightly too small, with the end result of the dickhead poking out of the top of the jeans. Usually unbeknownst to the owner.
“Hey mate you’re peaking.”
“Ah fuck I knew I should have bought a new pair of jeans.”