adjective
1.
not mature, ripe, developed, perfected, etc.

2.
emotionally undeveloped; juvenile; childish.

3.
suitable or designed for young people

4.
young, youthful, or immature
"You want to go to Disneyland? Man, that is so sippy cup..."

"Gonna go take your sippy cup bath? Make sure to bring your baby shampoo"

"I have to go talk to him during his sippy cup cry-fest cause his girl made fun of him."
by pfhorrunner October 7, 2011
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Juvenile or immature. From the popular children's drinking device 'a sippy cup', made with a covered lid with narrow built-in sipping slot to prevent spillage. Toddlers drink the beverage inside via the narrow slot, and the drink is almost impossible for them to spill because of the cup's design.
"God, look at those girls over there wearing Elmo-t-shirts at the mall. What, are they six or something?"
"Yeah, like that is so sippy cup already."

or

"What was it with rappers all wearing pacifiers and baggy toddler clothes a few years ago?"
"Yeah! Like was that sippy cup, or what?"
by Brandywine September 22, 2006
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Sippy Cup:
When u succ dick so fuckin hard, but he wont cum
Veronica: Bitch I sippy cupped Carl's dick so fucking hard last night
Emma: there's not much to succ anyways
Veronica: lmao mood
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When you can afford their crappy over priced drinks and bring your own anyway... I ain't paying 12.50 for a pina colada... So, I brought my own sippy cup!
by Camilla Tow August 21, 2014
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Slang for a young girl's vagina. The term is derived from the children's drinking cup. May also be related to the sippy noise of the sippy cup in reference to cunnilingus.
I had a drink from her sippy cup.
by xleninx October 30, 2006
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after ejaculating into your partners mouth, they spit back out the seman on to your erect penis....and then suck up or sip it back up into their mouth...giving the illlusion of drinking through the straw of a childs sippy cup!
Dude that after that Dawn girl gave me the best hummer of my life, she spit out my jizz back onto my cock and slurped it back up like juice out of a sippy cup!
by sippy69 August 10, 2011
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