A guy (usually gay) that enjoys sniffing another guys stinky socks or socked feet during anal/oral sex.
Tom is such a sock pig, after sex he keeps the dude’s stinky socks to sniff when jerks later.
Masturbating a guy with smegma, dick cheese, etc. or any other strong smelling substance.
There's no lube, but your dick cheese is slimy, I'll just use that! That's nasty you pig scrubbing bitch! Use spit!
A pig friend is that friend who eats all your food but ensures you food for your life. A friend that is there for you any time and helps you with all your shits. That one friend that lives you the most.
Friend1-"Sara is a pig friend but I love her"
Friend2-"Yeah she is but she loves us very very much"
When you are involved in an activity or item of work, which has no relevance to you, and isn't enjoyable
"I spent all morning like a pig in bacon. What a waste of time"