When one dude cums inside another dude who is reallyhorny and he wants to own him with his cum so he pushes it all inside him and makes him take every last drop of it with no condom holding it back
"Brady Quinnfucked me good last night, so fucking good, was an awesome seeding, he owns me"
I love polly seeds. What are polly seeds? Sunflower seeds are polly seeds! How did they get that name? Parrots say, "Polly want a cracker" and parrots eat sunflower seeds.... so they are called polly seeds!
A slut, who most likely has a boyfriend, who goes around strategically flirting with guys on the down low, thus planting seeds in the case that shit goes bad in the current relationship. They may occasionally have a random hookup which always ends with blue balls. Girls who take part are usually a 7+ out of 10. Traits: deceptive, misleading, lots of excuses, generally loose.
"Man, I was proper blue balled last night, turns out she was just a seedplanter."