Year of Hotness. Philosophy of getting as hot as possible in one year, and doing anything possible to pursue that excellence while still partying and prowling a lot. Includes eating well (but never cutting out alcohol), working out, and generally getting jacked n tan.
Often instituted in the year post-breakup of a major relationship.
Can also be used to justify certain behaviours (like ordering a salad, or drinking vodka sodas instead of beer)
A friend asks you to go out on a Thursday, but you can't until later because you need to run first. They get sad, you say "YOH baby" to remind them of your pursuit of excellence.
Matt: "I don't want to get pizza, it's not very YOH"