Chewing the Scenery: After turning heel, Batista started putting his propensity for Narm to good use.
Cool Old Guy: He was already in his thirties when he debuted in WWE. Of course, it helped that his longtime tag-team partner, Ric Flair, was a Badass Grandpa at that point.
Cool Shades: Tends to wear these when he's not wrestling.
Dirty Old Man: Repeatedly accused of hitting on the younger Divas, even if they were already seeing someone (and when he was married).
Dropped a Bridge on Him: It was pretty sad to see this world-class sports-entertainment star (who at one point was second in popularity to John Cena, no less!) reduced to a wildly ranting, wheelchair-bound maniac during his final appearance on WWE television.
Although that may have been his own wish. Chris Jericho said that he loved the way he went out during his leave of absence in 2005, being dragged out of the arena by security, kicking and screaming, because that's a way a heel goes out in style.
Duct Tape For Everything: At Extreme Rules 2010, Batista lost his Last Man Standing match against John Cena by getting his legs duct-taped around a ring post.
Fallen Hero: During his last heel run. Emphasized during his feud with John Cena at Wrestlemania 26.
Batista is pretty much Photoshop fodder at various wrestling forums (the majority of which comes from the former WrestleCrap forum).
To Rey Mysterio: "YER SAHPOZED TA BE MAH FREEEND!!"
Also, "I'm gonna rip your head off."
"Weapons aren't only welcomed... they're allowed!"
"...stoop that low! Duct tape!? Are you serious? Really? Duct tape?"
There was also his trademark ring entrance, which involved him miming the firing of a machine gun (which looked more like he was cabbage-patching) to the tune of Saliva's "I Walk Alone", which has been imitated by some WWE fans.
There was an episode of RAW which showed Batista warming up for his match, then a "fan" comes by and stands in front of him and imitates Batista's entrance. He is then chased away by security.
"JBL, at The Great American Bash... I'm gonna expose your ass!"
Humiliation Conga: The months after Wrestlemania XXVI to his retirement could count as this right up to his last night. Also might qualify as a Downer Ending.
Narm: When on the mic... or making any kind of face in general. More or less the main reason for his Memetic Mutation status.
Also, any time he shakes the ropes. It makes him look like the Ultimate Warrior and that... that's no good. (Although he came by it honestly: he admits he took the move straight from the Warrior.)
With a possible exception of his AWESOME promo leading up to his match with Cena at Wrestlemania. Yes... Batista and awesome promo in the same sentence... I hear something crumbling.
Screw This, I'm Outta Here: After repeatedly failing to beat John Cena for the world title, and getting injured in a match, he quit the WWE. But that was only on Kayfabe, because...
...He had later stated that he didn't like the direction in which the company was going.
Too Dumb to Live: His 2009 Face Heel Turn? Yeah, it basically happened because Batista apparently assumed that being in a Fatal Four Way for the World Heavyweight Championship with Rey Mysterio Jr as one of his opponents meant that Rey wouldn't actually try to win and would just help him.
Especially when Rey later admitted that if Batista had just asked him to help him, he would have.
It's standard Insane Troll Logic, which is standard operating procedure for most heels.