A rough-looking person who hangs out in rough neighbourhoods and doesn't do very much. Likely to make trouble.
Lotta grinders trying to get freebies at this McDonald's today.
A U.S. Marine Corps nickname for the drill field, often a large paved avera, where official drill & ceremonies are conducted. New recruits first experience the grinder at their Recruit Depot.
A type of boomer in Gears of War2, using a heavy machine gun. They are tough to take down when they outnumber you.
Grinder! Get Down!
When a girl is inexperienced at giving blowjobs and scrapes her teeth up and down your shaft and may accidentally bite down on your penis.
Dude that girl sucks at giving blowjobs! Bitch gave me a Grinder!
A player in massively-multiplayer online (MMO) games that is content to complete mindlessly repetitive tasks in order to increase an arbitrary number within a game to "level up".
Player A: "Hey, QuidditchKid792. How did you get your level up so fast from last night? You must have gone up three levels!"
Player B: "My friend is a grinder, and he leveled me up all last night in exchange for some Tier 6 equipment."
Some asshole who spends hours on end killing mobs in various MMORPGs with no real aim or purpose to gain levels at a supposedly increased rate.
Did you see that Grinder running around in Stranglethorn Vale? The guy should totally be doing the Green Hills of Stranglethorn quest while killing those humanoids.
A girl that knows how to back up the ass behind her.
She was hell of a grinder. I should have held on to her longer.