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The most quirky, bubbly person to roam this earth. Jillian is adorable and the best friend in the world. She will always have your back no matter what. She always has a pun ready or a quote from a book/ movie. You can always catch her singing. She has a great sense of humor and will sometimes tease you, but she's just telling you that she loves you. She has a lot of sarcasm, but that just adds to her awesome personality. If you have a Jillian, cherish her.
Person one: Does Jillian ever stop singing?!
Person two: Don't let her here you say that or else she'll tell you puns till you die!
Jillian by YourFriend1498 June 25, 2018
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the most amazing girl anybody could ever meet! a best friend for sure, and the best best friend you could ever have! alwAYS so much fun, laughs wayyyyy too much, gets high on m&m's, and won't let anyone get bored!
Omg, i want a jilian as my BFFl.
Woah, that girl is so Jilian.
Jilian by hehehart October 21, 2010

jack and jill 

jack and jill went up the hill to fetch some marijuana
jack got high and dropped his fly, and said "do ya wanna?"
jill said yes, and dropped her dress, and then they had some fun
silly jill, forgot her pill, and now they have a son
jack and jill used to fetch water
jack and jill by jillthepill August 1, 2006

jillian michaels 

the trainer from the biggest loser and one of the toughest scariest people in the known universe.....
contestant : I WANNA QUIT!!!
Jillian michaels: NEVER!!!!!! (turns into the hulk)
jillian michaels by whatever 45 March 26, 2010
female masturbation

the female equivalent of jacking off is jilling off.
Example: I was bored at home, and my boyfriend was out of town, so I started jilling off.
jilling by goodvibration December 8, 2007

Jillian Michaels 

jillian michaels came to fame as america's toughest trainer on the hugely popular weight loss show, the biggest loser. she rose up from her humble beginning as an unhealthy kid.

she has now launched best selling books (such as mastering your metabolism), iphone apps, podcasts (from her radio show) and a new tv show, losing it with jillian.

she's 5'2".
jillian michaels has inspired me to get off the ranch dressing, and onto the treadmill.