To get neiled is to get dogged. Most common in the online gaming community, especially games like Destiny during raids or strikes. Youre not a high enough level so you get booted from the team.
"Neiled" is slang for being scammed. It refers to an online record vendor that tricks customers into paying for out-of-stock merch and then never issues a refund.
"You get that new record you ordered from horizonsmusic.co.uk?"
"Nah, mate, I got neiled. Asked for a refund and then they ghosted me. Now I'm out 140 bucks."
"Harry! How are you? Did you ever get a refund for that order you cancelled on horizonsmusic.co.uk?"
"Hell no, bruv. Bastards neiled me."