Before WFA, this is commonly used in the UG and often people have asked where it's from. It's from bodybuilding.com. A user named "unconditional"
"Awesome pics. Great size. Look thick. Solid. Tight. Keep us all posted on your continued progress with any new progress pics or vid clips. Show us what you got man. Wanna see how freakin' huge, solid, thick and tight you can get. Thanks for the motivation."