A person, usually female, who acts mainly as a penis receptacle. As with electrical receptacles, cocksockets come in 2 distinct varieties:
1)Standard - average two-holed cocksocket
2)Grounded - cocksockets that take it in the third hole
"(insert name) from (insert sorority abbreviation) is such a cocksocket."
"I grounded that skank last night"
Translation: "I engaged in anal intercourse with that female last night."
"That bitch is grounded."
Translation: "She takes it in the rectum."
When you go out on a date with a girl, only to find out that she doesn't think it's a date (usually revealed by a third party). You then pretend to be excited for her while furiously ad-libbing an exit strategy.
Guy: You sure are nice.
Girl: So are you. Let's get coffee.
Guy: Great.
...
Girl: This coffee is delicious.
Guy: I'm having fun.
Someone: What are you doing for break?
Girl: Oh, I'm just going to Hawaii with my boyfriend to celebrate our one-month anniversary.
Guy: Guh! Wow...congratulations.
Girl: I'll say!
Guy: Welp, looks like it's about time for me to be hittin the ol Dusty Trail...
Girl: Bye!
...
Guy: COCKNOCKLED!