What is Clayton's?
1.
Adj. A substitute, an ersatz version; which is possibly inferior, or lacking some characteristics of the original.
Origin: from an advertising campaign of a non-alcoholic drink marketted in Australia and New Zealand as a substitute for whisky. "The drink you have when you're not having a drink". It was foul-tasting by all accounts.
"Oh, Peter? He's my Clayton's Boyfriend (laughter)"
(A male friend a woman might go out with and even be thought by observers to be in a couple with, yet not one with whom she is having a relationship. "The boyfriend you have when you aren't having a boyfriend")
"You worked 60 hours last week and then moderate the forum in your spare time? How do you do it?"
"It's my Clayton's life. The life you have when you're not having a life."